diff --git a/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/context_config.json b/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/context_config.json
new file mode 100644
index 000000000000..6a7266767f7f
--- /dev/null
+++ b/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/context_config.json
@@ -0,0 +1,82 @@
+{
+    "CONTEXTS": [
+        {
+            "guid" : 0,
+            "name" : "asic0",
+            "dbAsic" : "ASIC_DB",
+            "dbCounters" : "COUNTERS_DB",
+            "dbFlex": "FLEX_COUNTER_DB",
+            "dbState" : "STATE_DB",
+            "zmq_enable" : false,
+            "zmq_endpoint": "tcp://127.0.0.1:5555",
+            "zmq_ntf_endpoint": "tcp://127.0.0.1:5556",
+            "switches": [
+                {
+                    "index" : 0,
+                    "hwinfo" : ""
+                }
+            ]
+        },
+        {
+            "guid" : 1,
+            "name" : "phys",
+            "dbAsic" : "GB_ASIC_DB",
+            "dbCounters" : "GB_COUNTERS_DB",
+            "dbFlex": "GB_FLEX_COUNTER_DB",
+            "dbState" : "STATE_DB",
+            "zmq_enable" : false,
+            "zmq_endpoint": "tcp://127.0.0.1:5565",
+            "zmq_ntf_endpoint": "tcp://127.0.0.1:5566",
+            "switches": [
+                {
+                    "index" : 0,
+                    "hwinfo" : "mdio0_0_0/0"
+                },
+                {
+                    "index" : 1,
+                    "hwinfo" : "mdio1_0_0/0"
+                },
+                {
+                    "index" : 2,
+                    "hwinfo" : "mdio2_0_0/0"
+                },
+                {
+                    "index" : 3,
+                    "hwinfo" : "mdio3_0_0/0"
+                },
+                {
+                    "index" : 4,
+                    "hwinfo" : "mdio4_0_0/0"
+                },
+                {
+                    "index" : 5,
+                    "hwinfo" : "mdio5_0_0/0"
+                },
+                {
+                    "index" : 6,
+                    "hwinfo" : "mdio6_0_0/0"
+                },
+                {
+                    "index" : 7,
+                    "hwinfo" : "mdio7_0_0/0"
+                },
+                {
+                    "index" : 8,
+                    "hwinfo" : "mdio8_0_0/0"
+                },
+                {
+                    "index" : 9,
+                    "hwinfo" : "mdio9_0_0/0"
+                },
+                {
+                    "index" : 10,
+                    "hwinfo" : "mdio10_0_0/0"
+                },
+                {
+                    "index" : 11,
+                    "hwinfo" : "mdio11_0_0/0"
+                }
+            ]
+        }
+   ]
+}
diff --git a/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/gearbox_100G_PAM4.xml b/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/gearbox_100G_PAM4.xml
new file mode 100644
index 000000000000..95e20b91787e
--- /dev/null
+++ b/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/gearbox_100G_PAM4.xml
@@ -0,0 +1,37 @@
+<?xml version="1.0"?>
+<root>
+    <name>CSDK-B52</name>
+    <phy_addr>0</phy_addr>
+    <mode>gearbox</mode>
+    <topology>2</topology>
+    <tx-taps>
+        <PAM4>2,-8,17,0,0</PAM4>
+        <NRZ>0,-8,17,0,0</NRZ>
+    </tx-taps>
+    <tx-taps-scale>0,0,1,0,0</tx-taps-scale>
+
+    <lane id="0" system-side="true" />
+    <lane id="1" system-side="true" />
+    <lane id="2" system-side="true" />
+    <lane id="3" system-side="true" />
+    <lane id="4" system-side="true" />
+    <lane id="5" system-side="true" />
+    <lane id="6" system-side="true" />
+    <lane id="7" system-side="true" />
+    <lane id="8" system-side="false" />
+    <lane id="9" system-side="false" />
+    <lane id="10" system-side="false"  />
+    <lane id="11" system-side="false"  />
+    <lane id="12" system-side="false"  />
+    <lane id="13" system-side="false"  />
+    <lane id="14" system-side="false"  />
+    <lane id="15" system-side="false"  />
+    <lane id="16" system-side="false"  />
+    <lane id="17" system-side="false"  />
+    <lane id="18" system-side="false"  />
+    <lane id="19" system-side="false"  />
+    <lane id="20" system-side="false"  />
+    <lane id="21" system-side="false"  />
+    <lane id="22" system-side="false"  />
+    <lane id="23" system-side="false"  />
+</root>
diff --git a/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/gearbox_config.json b/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/gearbox_config.json
new file mode 100644
index 000000000000..be325b59995e
--- /dev/null
+++ b/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/gearbox_config.json
@@ -0,0 +1,498 @@
+{
+  "phys": [
+    {
+      "phy_id": 1,
+      "name": "phy1",
+      "address": "1",
+      "lib_name": "",
+      "firmware_path": "/usr/etc/credo/firmware/owl.lz4.fw.1.92.1.bin",
+      "config_file": "/usr/share/sonic/hwsku/phy1_config.json",
+      "sai_init_config_file": "",
+      "phy_access": "mdio",
+      "bus_id": 0,
+      "context_id": 1,
+      "hwinfo": "mdio0_0_0/0"
+    },
+    {
+      "phy_id": 2,
+      "name": "phy2",
+      "address": "2",
+      "lib_name": "",
+      "firmware_path": "/usr/etc/credo/firmware/owl.lz4.fw.1.92.1.bin",
+      "config_file": "/usr/share/sonic/hwsku/phy2_config.json",
+      "sai_init_config_file": "",
+      "phy_access": "mdio",
+      "bus_id": 0,
+      "context_id": 1,
+      "hwinfo": "mdio1_0_0/0"
+    },
+    {
+      "phy_id": 3,
+      "name": "phy3",
+      "address": "3",
+      "lib_name": "",
+      "firmware_path": "/usr/etc/credo/firmware/owl.lz4.fw.1.92.1.bin",
+      "config_file": "/usr/share/sonic/hwsku/phy3_config.json",
+      "sai_init_config_file": "",
+      "phy_access": "mdio",
+      "bus_id": 0,
+      "context_id": 1,
+      "hwinfo": "mdio2_0_0/0"
+    },
+    {
+      "phy_id": 4,
+      "name": "phy4",
+      "address": "4",
+      "lib_name": "",
+      "firmware_path": "/usr/etc/credo/firmware/owl.lz4.fw.1.92.1.bin",
+      "config_file": "/usr/share/sonic/hwsku/phy4_config.json",
+      "sai_init_config_file": "",
+      "phy_access": "mdio",
+      "bus_id": 0,
+      "context_id": 1,
+      "hwinfo": "mdio3_0_0/0"
+    },
+    {
+      "phy_id": 5,
+      "name": "phy5",
+      "address": "5",
+      "lib_name": "",
+      "firmware_path": "/usr/etc/credo/firmware/owl.lz4.fw.1.92.1.bin",
+      "config_file": "/usr/share/sonic/hwsku/phy5_config.json",
+      "sai_init_config_file": "",
+      "phy_access": "mdio",
+      "bus_id": 0,
+      "context_id": 1,
+      "hwinfo": "mdio4_0_0/0"
+    },
+    {
+      "phy_id": 6,
+      "name": "phy6",
+      "address": "6",
+      "lib_name": "",
+      "firmware_path": "/usr/etc/credo/firmware/owl.lz4.fw.1.92.1.bin",
+      "config_file": "/usr/share/sonic/hwsku/phy6_config.json",
+      "sai_init_config_file": "",
+      "phy_access": "mdio",
+      "bus_id": 0,
+      "context_id": 1,
+      "hwinfo": "mdio5_0_0/0"
+    },
+    {
+      "phy_id": 7,
+      "name": "phy7",
+      "address": "7",
+      "lib_name": "",
+      "firmware_path": "/usr/etc/credo/firmware/owl.lz4.fw.1.92.1.bin",
+      "config_file": "/usr/share/sonic/hwsku/phy7_config.json",
+      "sai_init_config_file": "",
+      "phy_access": "mdio",
+      "bus_id": 0,
+      "context_id": 1,
+      "hwinfo": "mdio6_0_0/0"
+    },
+    {
+      "phy_id": 8,
+      "name": "phy8",
+      "address": "8",
+      "lib_name": "",
+      "firmware_path": "/usr/etc/credo/firmware/owl.lz4.fw.1.92.1.bin",
+      "config_file": "/usr/share/sonic/hwsku/phy8_config.json",
+      "sai_init_config_file": "",
+      "phy_access": "mdio",
+      "bus_id": 0,
+      "context_id": 1,
+      "hwinfo": "mdio7_0_0/0"
+    },
+    {
+      "phy_id": 9,
+      "name": "phy9",
+      "address": "9",
+      "lib_name": "",
+      "firmware_path": "/usr/etc/credo/firmware/owl.lz4.fw.1.92.1.bin",
+      "config_file": "/usr/share/sonic/hwsku/phy9_config.json",
+      "sai_init_config_file": "",
+      "phy_access": "mdio",
+      "bus_id": 0,
+      "context_id": 1,
+      "hwinfo": "mdio8_0_0/0"
+    },
+    {
+      "phy_id": 10,
+      "name": "phy10",
+      "address": "10",
+      "lib_name": "",
+      "firmware_path": "/usr/etc/credo/firmware/owl.lz4.fw.1.92.1.bin",
+      "config_file": "/usr/share/sonic/hwsku/phy10_config.json",
+      "sai_init_config_file": "",
+      "phy_access": "mdio",
+      "bus_id": 0,
+      "context_id": 1,
+      "hwinfo": "mdio9_0_0/0"
+    },
+    {
+      "phy_id": 11,
+      "name": "phy11",
+      "address": "11",
+      "lib_name": "",
+      "firmware_path": "/usr/etc/credo/firmware/owl.lz4.fw.1.92.1.bin",
+      "config_file": "/usr/share/sonic/hwsku/phy11_config.json",
+      "sai_init_config_file": "",
+      "phy_access": "mdio",
+      "bus_id": 0,
+      "context_id": 1,
+      "hwinfo": "mdio10_0_0/0"
+    },
+    {
+      "phy_id": 12,
+      "name": "phy12",
+      "address": "12",
+      "lib_name": "",
+      "firmware_path": "/usr/etc/credo/firmware/owl.lz4.fw.1.92.1.bin",
+      "config_file": "/usr/share/sonic/hwsku/phy12_config.json",
+      "sai_init_config_file": "",
+      "phy_access": "mdio",
+      "bus_id": 0,
+      "context_id": 1,
+      "hwinfo": "mdio11_0_0/0"
+    }
+  ],
+  "interfaces": [
+    {
+      "name": "Ethernet0",
+      "index": 1,
+      "phy_id": 1,
+      "system_lanes": [6,7],
+      "line_lanes": [8,9,10,11]
+    },
+    {
+      "name": "Ethernet4",
+      "index": 2,
+      "phy_id": 1,
+      "system_lanes": [2,3],
+      "line_lanes": [16,17,18,19]
+    },
+    {
+      "name": "Ethernet8",
+      "index": 3,
+      "phy_id": 1,
+      "system_lanes": [4,5],
+      "line_lanes": [20,21,22,23]
+    },
+    {
+      "name": "Ethernet12",
+      "index": 4,
+      "phy_id": 1,
+      "system_lanes": [0,1],
+      "line_lanes": [12,13,14,15]
+    },
+    {
+      "name": "Ethernet16",
+      "index": 5,
+      "phy_id": 2,
+      "system_lanes": [6,7],
+      "line_lanes": [8,9,10,11]
+    },
+    {
+      "name": "Ethernet20",
+      "index": 6,
+      "phy_id": 2,
+      "system_lanes": [2,3],
+      "line_lanes": [16,17,18,19]
+    },
+    {
+      "name": "Ethernet24",
+      "index": 7,
+      "phy_id": 2,
+      "system_lanes": [4,5],
+      "line_lanes": [20,21,22,23]
+    },
+    {
+      "name": "Ethernet28",
+      "index": 8,
+      "phy_id": 2,
+      "system_lanes": [0,1],
+      "line_lanes": [12,13,14,15]
+    },
+    {
+      "name": "Ethernet32",
+      "index": 9,
+      "phy_id": 3,
+      "system_lanes": [6,7],
+      "line_lanes": [8,9,10,11]
+    },
+    {
+      "name": "Ethernet36",
+      "index": 10,
+      "phy_id": 3,
+      "system_lanes": [2,3],
+      "line_lanes": [16,17,18,19]
+    },
+    {
+      "name": "Ethernet40",
+      "index": 11,
+      "phy_id": 3,
+      "system_lanes": [4,5],
+      "line_lanes": [20,21,22,23]
+    },
+    {
+      "name": "Ethernet44",
+      "index": 12,
+      "phy_id": 3,
+      "system_lanes": [0,1],
+      "line_lanes": [12,13,14,15]
+    },
+    {
+      "name": "Ethernet48",
+      "index": 13,
+      "phy_id": 4,
+      "system_lanes": [6,7],
+      "line_lanes": [8,9,10,11]
+    },
+    {
+      "name": "Ethernet52",
+      "index": 14,
+      "phy_id": 4,
+      "system_lanes": [2,3],
+      "line_lanes": [16,17,18,19]
+    },
+    {
+      "name": "Ethernet56",
+      "index": 15,
+      "phy_id": 4,
+      "system_lanes": [4,5],
+      "line_lanes": [20,21,22,23]
+    },
+    {
+      "name": "Ethernet60",
+      "index": 16,
+      "phy_id": 4,
+      "system_lanes": [0,1],
+      "line_lanes": [12,13,14,15]
+    },
+    {
+      "name": "Ethernet64",
+      "index": 17,
+      "phy_id": 5,
+      "system_lanes": [6,7],
+      "line_lanes": [8,9,10,11]
+    },
+    {
+      "name": "Ethernet68",
+      "index": 18,
+      "phy_id": 5,
+      "system_lanes": [2,3],
+      "line_lanes": [16,17,18,19]
+    },
+    {
+      "name": "Ethernet72",
+      "index": 19,
+      "phy_id": 5,
+      "system_lanes": [4,5],
+      "line_lanes": [20,21,22,23]
+    },
+    {
+      "name": "Ethernet76",
+      "index": 20,
+      "phy_id": 5,
+      "system_lanes": [0,1],
+      "line_lanes": [12,13,14,15]
+    },
+    {
+      "name": "Ethernet80",
+      "index": 21,
+      "phy_id": 6,
+      "system_lanes": [6,7],
+      "line_lanes": [8,9,10,11]
+    },
+    {
+      "name": "Ethernet84",
+      "index": 22,
+      "phy_id": 6,
+      "system_lanes": [2,3],
+      "line_lanes": [16,17,18,19]
+    },
+    {
+      "name": "Ethernet88",
+      "index": 23,
+      "phy_id": 6,
+      "system_lanes": [4,5],
+      "line_lanes": [20,21,22,23]
+    },
+    {
+      "name": "Ethernet92",
+      "index": 24,
+      "phy_id": 6,
+      "system_lanes": [0,1],
+      "line_lanes": [12,13,14,15]
+    },
+    {
+      "name": "Ethernet96",
+      "index": 25,
+      "phy_id": 7,
+      "system_lanes": [6,7],
+      "line_lanes": [8,9,10,11]
+    },
+    {
+      "name": "Ethernet100",
+      "index": 26,
+      "phy_id": 7,
+      "system_lanes": [2,3],
+      "line_lanes": [16,17,18,19]
+    },
+    {
+      "name": "Ethernet104",
+      "index": 27,
+      "phy_id": 7,
+      "system_lanes": [4,5],
+      "line_lanes": [20,21,22,23]
+    },
+    {
+      "name": "Ethernet108",
+      "index": 28,
+      "phy_id": 7,
+      "system_lanes": [0,1],
+      "line_lanes": [12,13,14,15]
+    },
+    {
+      "name": "Ethernet112",
+      "index": 29,
+      "phy_id": 8,
+      "system_lanes": [6,7],
+      "line_lanes": [8,9,10,11]
+    },
+    {
+      "name": "Ethernet116",
+      "index": 30,
+      "phy_id": 8,
+      "system_lanes": [2,3],
+      "line_lanes": [16,17,18,19]
+    },
+    {
+      "name": "Ethernet120",
+      "index": 31,
+      "phy_id": 8,
+      "system_lanes": [4,5],
+      "line_lanes": [20,21,22,23]
+    },
+    {
+      "name": "Ethernet124",
+      "index": 32,
+      "phy_id": 8,
+      "system_lanes": [0,1],
+      "line_lanes": [12,13,14,15]
+    },
+    {
+      "name": "Ethernet128",
+      "index": 33,
+      "phy_id": 9,
+      "system_lanes": [6,7],
+      "line_lanes": [8,9,10,11]
+    },
+    {
+      "name": "Ethernet132",
+      "index": 34,
+      "phy_id": 9,
+      "system_lanes": [2,3],
+      "line_lanes": [16,17,18,19]
+    },
+    {
+      "name": "Ethernet136",
+      "index": 35,
+      "phy_id": 9,
+      "system_lanes": [4,5],
+      "line_lanes": [20,21,22,23]
+    },
+    {
+      "name": "Ethernet140",
+      "index": 36,
+      "phy_id": 9,
+      "system_lanes": [0,1],
+      "line_lanes": [12,13,14,15]
+    },
+    {
+      "name": "Ethernet144",
+      "index": 37,
+      "phy_id": 10,
+      "system_lanes": [6,7],
+      "line_lanes": [8,9,10,11]
+    },
+    {
+      "name": "Ethernet148",
+      "index": 38,
+      "phy_id": 10,
+      "system_lanes": [2,3],
+      "line_lanes": [16,17,18,19]
+    },
+    {
+      "name": "Ethernet152",
+      "index": 39,
+      "phy_id": 10,
+      "system_lanes": [4,5],
+      "line_lanes": [20,21,22,23]
+    },
+    {
+      "name": "Ethernet156",
+      "index": 40,
+      "phy_id": 10,
+      "system_lanes": [0,1],
+      "line_lanes": [12,13,14,15]
+    },
+    {
+      "name": "Ethernet160",
+      "index": 41,
+      "phy_id": 11,
+      "system_lanes": [6,7],
+      "line_lanes": [8,9,10,11]
+    },
+    {
+      "name": "Ethernet164",
+      "index": 42,
+      "phy_id": 11,
+      "system_lanes": [2,3],
+      "line_lanes": [16,17,18,19]
+    },
+    {
+      "name": "Ethernet168",
+      "index": 43,
+      "phy_id": 11,
+      "system_lanes": [4,5],
+      "line_lanes": [20,21,22,23]
+    },
+    {
+      "name": "Ethernet172",
+      "index": 44,
+      "phy_id": 11,
+      "system_lanes": [0,1],
+      "line_lanes": [12,13,14,15]
+    },
+    {
+      "name": "Ethernet176",
+      "index": 45,
+      "phy_id": 12,
+      "system_lanes": [6,7],
+      "line_lanes": [8,9,10,11]
+    },
+    {
+      "name": "Ethernet180",
+      "index": 46,
+      "phy_id": 12,
+      "system_lanes": [2,3],
+      "line_lanes": [16,17,18,19]
+    },
+    {
+      "name": "Ethernet184",
+      "index": 47,
+      "phy_id": 12,
+      "system_lanes": [4,5],
+      "line_lanes": [20,21,22,23]
+    },
+    {
+      "name": "Ethernet188",
+      "index": 48,
+      "phy_id": 12,
+      "system_lanes": [0,1],
+      "line_lanes": [12,13,14,15]
+    }
+  ]
+}
diff --git a/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/jr2-a7280cr3-32d4-40x100G.config.bcm b/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/jr2-a7280cr3-32d4-40x100G.config.bcm
new file mode 120000
index 000000000000..0ee60899c829
--- /dev/null
+++ b/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/jr2-a7280cr3-32d4-40x100G.config.bcm
@@ -0,0 +1 @@
+../../x86_64-arista_7800r3_48cq2_lc/Arista-7800R3-48CQ2-C48/jr2-a7280cr3-32d4-40x100G.config.bcm
\ No newline at end of file
diff --git a/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/phy10_config.json b/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/phy10_config.json
new file mode 100644
index 000000000000..beee22dfa2e7
--- /dev/null
+++ b/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/phy10_config.json
@@ -0,0 +1,101 @@
+{
+  "lanes": [
+    {
+      "index": 200,
+      "local_lane_id": 0,
+      "system_side": true,
+      "tx_polarity": 0,
+      "rx_polarity": 0,
+      "line_tx_lanemap": 0,
+      "line_rx_lanemap": 0,
+      "line_to_system_lanemap": 0,
+      "mdio_addr": ""
+    }
+  ],
+  "ports": [
+    {
+      "index": 37,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    },
+    {
+      "index": 38,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    },
+    {
+      "index": 39,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    },
+    {
+      "index": 40,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    }
+  ]
+}
diff --git a/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/phy11_config.json b/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/phy11_config.json
new file mode 100644
index 000000000000..96e81456859d
--- /dev/null
+++ b/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/phy11_config.json
@@ -0,0 +1,101 @@
+{
+  "lanes": [
+    {
+      "index": 200,
+      "local_lane_id": 0,
+      "system_side": true,
+      "tx_polarity": 0,
+      "rx_polarity": 0,
+      "line_tx_lanemap": 0,
+      "line_rx_lanemap": 0,
+      "line_to_system_lanemap": 0,
+      "mdio_addr": ""
+    }
+  ],
+  "ports": [
+    {
+      "index": 41,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    },
+    {
+      "index": 42,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    },
+    {
+      "index": 43,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    },
+    {
+      "index": 44,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    }
+  ]
+}
diff --git a/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/phy12_config.json b/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/phy12_config.json
new file mode 100644
index 000000000000..bb1c7eab69a7
--- /dev/null
+++ b/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/phy12_config.json
@@ -0,0 +1,101 @@
+{
+  "lanes": [
+    {
+      "index": 200,
+      "local_lane_id": 0,
+      "system_side": true,
+      "tx_polarity": 0,
+      "rx_polarity": 0,
+      "line_tx_lanemap": 0,
+      "line_rx_lanemap": 0,
+      "line_to_system_lanemap": 0,
+      "mdio_addr": ""
+    }
+  ],
+  "ports": [
+    {
+      "index": 45,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    },
+    {
+      "index": 46,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    },
+    {
+      "index": 47,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    },
+    {
+      "index": 48,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    }
+  ]
+}
diff --git a/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/phy1_config.json b/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/phy1_config.json
new file mode 100644
index 000000000000..14c7bd4dd373
--- /dev/null
+++ b/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/phy1_config.json
@@ -0,0 +1,101 @@
+{
+  "lanes": [
+    {
+      "index": 200,
+      "local_lane_id": 0,
+      "system_side": true,
+      "tx_polarity": 0,
+      "rx_polarity": 0,
+      "line_tx_lanemap": 0,
+      "line_rx_lanemap": 0,
+      "line_to_system_lanemap": 0,
+      "mdio_addr": ""
+    }
+  ],
+  "ports": [
+    {
+      "index": 1,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    },
+    {
+      "index": 2,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    },
+    {
+      "index": 3,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    },
+    {
+      "index": 4,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    }
+  ]
+}
diff --git a/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/phy2_config.json b/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/phy2_config.json
new file mode 100644
index 000000000000..d3723ca2c96d
--- /dev/null
+++ b/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/phy2_config.json
@@ -0,0 +1,101 @@
+{
+  "lanes": [
+    {
+      "index": 200,
+      "local_lane_id": 0,
+      "system_side": true,
+      "tx_polarity": 0,
+      "rx_polarity": 0,
+      "line_tx_lanemap": 0,
+      "line_rx_lanemap": 0,
+      "line_to_system_lanemap": 0,
+      "mdio_addr": ""
+    }
+  ],
+  "ports": [
+    {
+      "index": 5,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    },
+    {
+      "index": 6,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    },
+    {
+      "index": 7,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    },
+    {
+      "index": 8,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    }
+  ]
+}
diff --git a/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/phy3_config.json b/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/phy3_config.json
new file mode 100644
index 000000000000..6be7eed4e33d
--- /dev/null
+++ b/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/phy3_config.json
@@ -0,0 +1,101 @@
+{
+  "lanes": [
+    {
+      "index": 200,
+      "local_lane_id": 0,
+      "system_side": true,
+      "tx_polarity": 0,
+      "rx_polarity": 0,
+      "line_tx_lanemap": 0,
+      "line_rx_lanemap": 0,
+      "line_to_system_lanemap": 0,
+      "mdio_addr": ""
+    }
+  ],
+  "ports": [
+    {
+      "index": 9,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    },
+    {
+      "index": 10,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    },
+    {
+      "index": 11,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    },
+    {
+      "index": 12,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    }
+  ]
+}
diff --git a/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/phy4_config.json b/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/phy4_config.json
new file mode 100644
index 000000000000..ca8dfca226f8
--- /dev/null
+++ b/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/phy4_config.json
@@ -0,0 +1,101 @@
+{
+  "lanes": [
+    {
+      "index": 200,
+      "local_lane_id": 0,
+      "system_side": true,
+      "tx_polarity": 0,
+      "rx_polarity": 0,
+      "line_tx_lanemap": 0,
+      "line_rx_lanemap": 0,
+      "line_to_system_lanemap": 0,
+      "mdio_addr": ""
+    }
+  ],
+  "ports": [
+    {
+      "index": 13,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    },
+    {
+      "index": 14,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    },
+    {
+      "index": 15,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    },
+    {
+      "index": 16,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    }
+  ]
+}
diff --git a/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/phy5_config.json b/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/phy5_config.json
new file mode 100644
index 000000000000..fac78adecf09
--- /dev/null
+++ b/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/phy5_config.json
@@ -0,0 +1,101 @@
+{
+  "lanes": [
+    {
+      "index": 200,
+      "local_lane_id": 0,
+      "system_side": true,
+      "tx_polarity": 0,
+      "rx_polarity": 0,
+      "line_tx_lanemap": 0,
+      "line_rx_lanemap": 0,
+      "line_to_system_lanemap": 0,
+      "mdio_addr": ""
+    }
+  ],
+  "ports": [
+    {
+      "index": 17,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    },
+    {
+      "index": 18,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    },
+    {
+      "index": 19,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    },
+    {
+      "index": 20,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    }
+  ]
+}
diff --git a/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/phy6_config.json b/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/phy6_config.json
new file mode 100644
index 000000000000..ad70c69489eb
--- /dev/null
+++ b/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/phy6_config.json
@@ -0,0 +1,101 @@
+{
+  "lanes": [
+    {
+      "index": 200,
+      "local_lane_id": 0,
+      "system_side": true,
+      "tx_polarity": 0,
+      "rx_polarity": 0,
+      "line_tx_lanemap": 0,
+      "line_rx_lanemap": 0,
+      "line_to_system_lanemap": 0,
+      "mdio_addr": ""
+    }
+  ],
+  "ports": [
+    {
+      "index": 21,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    },
+    {
+      "index": 22,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    },
+    {
+      "index": 23,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    },
+    {
+      "index": 24,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    }
+  ]
+}
diff --git a/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/phy7_config.json b/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/phy7_config.json
new file mode 100644
index 000000000000..1b927fa78c88
--- /dev/null
+++ b/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/phy7_config.json
@@ -0,0 +1,101 @@
+{
+  "lanes": [
+    {
+      "index": 200,
+      "local_lane_id": 0,
+      "system_side": true,
+      "tx_polarity": 0,
+      "rx_polarity": 0,
+      "line_tx_lanemap": 0,
+      "line_rx_lanemap": 0,
+      "line_to_system_lanemap": 0,
+      "mdio_addr": ""
+    }
+  ],
+  "ports": [
+    {
+      "index": 25,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    },
+    {
+      "index": 26,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    },
+    {
+      "index": 27,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    },
+    {
+      "index": 28,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    }
+  ]
+}
diff --git a/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/phy8_config.json b/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/phy8_config.json
new file mode 100644
index 000000000000..1a6d8cf3a43c
--- /dev/null
+++ b/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/phy8_config.json
@@ -0,0 +1,101 @@
+{
+  "lanes": [
+    {
+      "index": 200,
+      "local_lane_id": 0,
+      "system_side": true,
+      "tx_polarity": 0,
+      "rx_polarity": 0,
+      "line_tx_lanemap": 0,
+      "line_rx_lanemap": 0,
+      "line_to_system_lanemap": 0,
+      "mdio_addr": ""
+    }
+  ],
+  "ports": [
+    {
+      "index": 29,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    },
+    {
+      "index": 30,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    },
+    {
+      "index": 31,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    },
+    {
+      "index": 32,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    }
+  ]
+}
diff --git a/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/phy9_config.json b/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/phy9_config.json
new file mode 100644
index 000000000000..8d7eeb2cef63
--- /dev/null
+++ b/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/phy9_config.json
@@ -0,0 +1,101 @@
+{
+  "lanes": [
+    {
+      "index": 200,
+      "local_lane_id": 0,
+      "system_side": true,
+      "tx_polarity": 0,
+      "rx_polarity": 0,
+      "line_tx_lanemap": 0,
+      "line_rx_lanemap": 0,
+      "line_to_system_lanemap": 0,
+      "mdio_addr": ""
+    }
+  ],
+  "ports": [
+    {
+      "index": 33,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    },
+    {
+      "index": 34,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    },
+    {
+      "index": 35,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    },
+    {
+      "index": 36,
+      "mdio_addr": "",
+      "system_speed": 50000,
+      "system_fec": "rs",
+      "system_auto_neg": false,
+      "system_loopback": "none",
+      "system_training": false,
+      "line_speed": 25000,
+      "line_fec": "rs",
+      "line_auto_neg": false,
+      "line_loopback": "none",
+      "line_training": false,
+      "line_media_type": "fiber",
+      "line_intf_type": "none",
+      "line_adver_speed": [],
+      "line_adver_fec": [],
+      "line_adver_auto_neg": false,
+      "line_adver_asym_pause": false,
+      "line_adver_media_type": "fiber"
+    }
+  ]
+}
diff --git a/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/port_config.ini b/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/port_config.ini
new file mode 120000
index 000000000000..7f26462e8975
--- /dev/null
+++ b/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/port_config.ini
@@ -0,0 +1 @@
+../../x86_64-arista_7800r3_48cq2_lc/Arista-7800R3-48CQ2-C48/port_config.ini
\ No newline at end of file
diff --git a/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/psai.profile b/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/psai.profile
new file mode 100644
index 000000000000..da589793cf08
--- /dev/null
+++ b/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/psai.profile
@@ -0,0 +1 @@
+SAI_KEY_INIT_CONFIG_FILE=/usr/share/sonic/hwsku/gearbox_100G_PAM4.xml
diff --git a/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/sai.profile b/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/sai.profile
new file mode 120000
index 000000000000..d09299d9e426
--- /dev/null
+++ b/device/arista/x86_64-arista_7800r3_48cqm2_lc/Arista-7800R3-48CQM2-C48/sai.profile
@@ -0,0 +1 @@
+../../x86_64-arista_7800r3_48cq2_lc/Arista-7800R3-48CQ2-C48/sai.profile
\ No newline at end of file
diff --git a/device/arista/x86_64-arista_7800r3_48cqm2_lc/chassisdb.conf b/device/arista/x86_64-arista_7800r3_48cqm2_lc/chassisdb.conf
new file mode 120000
index 000000000000..884f43b069a9
--- /dev/null
+++ b/device/arista/x86_64-arista_7800r3_48cqm2_lc/chassisdb.conf
@@ -0,0 +1 @@
+../x86_64-arista_7800r3_48cq2_lc/chassisdb.conf
\ No newline at end of file
diff --git a/device/arista/x86_64-arista_7800r3_48cqm2_lc/gbsyncd.ini b/device/arista/x86_64-arista_7800r3_48cqm2_lc/gbsyncd.ini
new file mode 100644
index 000000000000..9bd130dff9ef
--- /dev/null
+++ b/device/arista/x86_64-arista_7800r3_48cqm2_lc/gbsyncd.ini
@@ -0,0 +1 @@
+platform=gbsyncd-credo