[virtual switch] Does virtual switch support LAG ?

[keboliu]

I tried to config LAG interface in virtual switch by adding fllowing to the config_db.json and then restart the vs container.

  "PORTCHANNEL_INTERFACE": {
        "PortChannel0001|10.0.0.56/31": {}, 
        "PortChannel0001|FC00::71/126": {}
    }, 
    "PORTCHANNEL": {
        "PortChannel0001": {
            "members": [
                "Ethernet112"
            ]
        }
    },

But seems the LAG was not created and can only find it's configuration in CONFIG_DB, guess this is due to lack of teamd support in the virtual switch?

kebol@arc-host74-006 ~]$sudo docker exec -it vs ifconfig PortChannel0001
PortChannel0001: error fetching interface information: Device not found

[kebol@arc-host74-006 ~]$sudo docker exec -it vs redis-cli -n 4 keys \*PORTCHANNEL*
1) "PORTCHANNEL|PortChannel0001"
2) "PORTCHANNEL_INTERFACE|PortChannel0001|FC00::71/126"
3) "PORTCHANNEL_INTERFACE|PortChannel0001|10.0.0.56/31"

[kebol@arc-host74-006 ~]$sudo docker exec -it vs redis-cli -n 6 keys \*LAG*
(empty list or set)

[keboliu]

for how to add LAG config in VS, refer to #1720 #sonic-net/sonic-swss#507 and #sonic-net/sonic-swss#494