diff --git a/PowerArubaSW/Private/Webrequest.ps1 b/PowerArubaSW/Private/Webrequest.ps1
index f05788d..1280756 100644
--- a/PowerArubaSW/Private/Webrequest.ps1
+++ b/PowerArubaSW/Private/Webrequest.ps1
@@ -13,19 +13,29 @@ function Invoke-ArubaSWWebRequest() {
        Invoke WebRequest with ArubaSW connection variable (IP Address, cookie, port...)
 
       .EXAMPLE
-      Invoke-ArubaSWWebRequest -method "get" -uri "rest/v4/vlan"
+      Invoke-ArubaSWWebRequest -method "get" -uri "vlan"
 
-      Invoke-WebRequest with ArubaSW connection for get rest/v4/vlan
+      Invoke-WebRequest with ArubaSW connection for get rest/vX/vlan
 
       .EXAMPLE
-      Invoke-ArubaSWWebRequest "rest/v4/system"
+      Invoke-ArubaSWWebRequest "system"
 
-      Invoke-WebRequest with ArubaSW connection for get rest/v4/system uri with default GET method parameter
+      Invoke-WebRequest with ArubaSW connection for get rest/vX/system uri with default GET method parameter
 
       .EXAMPLE
-      Invoke-ArubaSWWebRequest -method "post" -uri "rest/v4/system" -body $body
+      Invoke-ArubaSWWebRequest -method "post" -uri "system" -body $body
 
-      Invoke-WebRequest with ArubaSW connection for post rest/v4/system uri with $body payload
+      Invoke-WebRequest with ArubaSW connection for post est/vX/ssystem uri with $body payload
+
+      .EXAMPLE
+      Invoke-ArubaSWWebRequest -method "get" -uri "system" -api_version 4
+
+      Invoke-WebRequest with ArubaSW connection for get rest/v4/ssystem uri
+
+      .EXAMPLE
+      Invoke-ArubaSWWebRequest -method "get" -uri "/rest/v8/system" -api_version 0
+
+      Invoke-WebRequest with ArubaSW connection for get /rest/v8/system uri
 
     #>
 
@@ -36,6 +46,9 @@ function Invoke-ArubaSWWebRequest() {
         [ValidateSet("GET", "POST", "DELETE", "PUT")]
         [String]$method = "get",
         [Parameter(Mandatory = $false)]
+        [ValidateRange(0, 10)]
+        [int]$api_version,
+        [Parameter(Mandatory = $false)]
         [psobject]$body,
         [Parameter(Mandatory = $false)]
         [psobject]$connection
@@ -60,12 +73,25 @@ function Invoke-ArubaSWWebRequest() {
         $sessionvariable = $connection.session
 
         if ($httpOnly) {
-            $fullurl = "http://${Server}:${port}/${uri}"
+            $fullurl = "http://${Server}:${port}/"
         }
         else {
-            $fullurl = "https://${Server}:${port}/${uri}"
+            $fullurl = "https://${Server}:${port}/"
         }
 
+        if ( $PsBoundParameters.ContainsKey('api_version') ) {
+            #Not Equal to 0, we add $api_version (if 0 we don't add rest info..)
+            if ($api_version -ne "0") {
+                $fullurl += "rest/v" + $api_version + "/"
+            }
+        }
+        else {
+            #Get info from connection
+            $fullurl += "rest/v" + $connection.api_version.cur + "/"
+        }
+
+        $fullurl += $uri
+
         try {
             if ($body) {
 
diff --git a/PowerArubaSW/Public/Banner.ps1 b/PowerArubaSW/Public/Banner.ps1
index 59772bf..acc80e3 100644
--- a/PowerArubaSW/Public/Banner.ps1
+++ b/PowerArubaSW/Public/Banner.ps1
@@ -32,7 +32,7 @@ function Get-ArubaSWBanner {
 
     Process {
 
-        $uri = "rest/v4/banner"
+        $uri = "banner"
 
         $response = Invoke-ArubaSWWebRequest -method "GET" -uri $uri -connection $connection
 
@@ -105,7 +105,7 @@ function Set-ArubaSWBanner {
     }
 
     Process {
-        $uri = "rest/v4/banner"
+        $uri = "banner"
 
         $banner = New-Object -TypeName PSObject
 
diff --git a/PowerArubaSW/Public/CLI.ps1 b/PowerArubaSW/Public/CLI.ps1
index c1e46b0..a0cbba3 100644
--- a/PowerArubaSW/Public/CLI.ps1
+++ b/PowerArubaSW/Public/CLI.ps1
@@ -47,7 +47,7 @@ function Get-ArubaSWCli {
 
     Process {
 
-        $uri = "rest/v4/cli"
+        $uri = "cli"
 
         $run = New-Object -TypeName PSObject
 
@@ -120,7 +120,7 @@ function Send-ArubaSWCliBatch {
             $nb = $nb + 1
         }
 
-        $uri = "rest/v4/cli_batch"
+        $uri = "cli_batch"
 
         $conf = New-Object -TypeName PSObject
 
@@ -167,7 +167,7 @@ function Get-ArubaSWCliBatchStatus {
 
     Process {
 
-        $uri = "rest/v4/cli_batch/status"
+        $uri = "cli_batch/status"
 
         $response = Invoke-ArubaSWWebRequest -method "GET" -uri $uri -connection $connection
 
diff --git a/PowerArubaSW/Public/Connection.ps1 b/PowerArubaSW/Public/Connection.ps1
index 5ade3a1..fb60cd5 100644
--- a/PowerArubaSW/Public/Connection.ps1
+++ b/PowerArubaSW/Public/Connection.ps1
@@ -57,6 +57,11 @@ function Connect-ArubaSW {
 
       Connect to an ArubaOS Switch with IP 192.0.2.1 and store connection info to $sw2 variable
       and don't store connection on global ($DefaultArubaSWConnection) variable
+
+     .EXAMPLE
+      Connect-ArubaSW -Server 192.0.2.1 -api_version 2
+
+      Connect to an ArubaOS Switch with IP 192.0.2.1 using v2 API
   #>
 
     Param(
@@ -69,8 +74,6 @@ function Connect-ArubaSW {
         [Parameter(Mandatory = $false)]
         [PSCredential]$Credentials,
         [Parameter(Mandatory = $false)]
-        [switch]$noverbose = $false,
-        [Parameter(Mandatory = $false)]
         [switch]$httpOnly = $false,
         [Parameter(Mandatory = $false)]
         [switch]$SkipCertificateCheck = $false,
@@ -78,6 +81,9 @@ function Connect-ArubaSW {
         [ValidateRange(1, 65535)]
         [int]$port,
         [Parameter(Mandatory = $false)]
+        [ValidateRange(1, 10)]
+        [int]$api_version,
+        [Parameter(Mandatory = $false)]
         [boolean]$DefaultConnection = $true
     )
 
@@ -86,7 +92,8 @@ function Connect-ArubaSW {
 
     Process {
 
-        $connection = @{server = ""; session = ""; cookie = ""; httpOnly = $false; port = ""; invokeParams = ""; switch_type = "" }
+        $version = @{min = ""; cur = ""; max = "" }
+        $connection = @{server = ""; session = ""; cookie = ""; httpOnly = $false; port = ""; invokeParams = ""; switch_type = "" ; api_version = $version ; product_number = "" }
 
         #If there is a password (and a user), create a credentials
         if ($Password) {
@@ -115,7 +122,7 @@ function Connect-ArubaSW {
                 $port = 80
             }
             $connection.httpOnly = $true
-            $uri = "http://${Server}:${port}/rest/v3/login-sessions"
+            $uri = "http://${Server}:${port}/"
         }
         else {
             if (!$port) {
@@ -131,7 +138,15 @@ function Connect-ArubaSW {
                     Set-ArubaSWuntrustedSSL
                 }
             }
-            $uri = "https://${Server}:${port}/rest/v3/login-sessions"
+            $uri = "https://${Server}:${port}/"
+        }
+
+        if ($PsBoundParameters.ContainsKey('api_version')) {
+            $uri += "rest/v${api_version}/login-sessions"
+        }
+        else {
+            #By default use v3 API (some 'new' device don't support v1/v2 API...)
+            $uri += "rest/v3/login-sessions"
         }
 
         try {
@@ -155,30 +170,54 @@ function Connect-ArubaSW {
             Set-Variable -name DefaultArubaSWConnection -value $connection -scope Global
         }
 
+        $restversion = Get-ArubaSWRestversion -connection $connection
+        #Remove v and .x (.0, 1)
+        $vers = $restversion.version -replace "v" -replace ".0" -replace ".1"
+
+        $connection.api_version.min = ($vers | Measure-Object -Minimum).Minimum
+        $connection.api_version.max = ($vers | Measure-Object -Maximum).Maximum
+
+        if ($PsBoundParameters.ContainsKey('api_version')) {
+            $connection.api_version.cur = $api_version
+        }
+        else {
+            #use by default the high version release supported
+            $connection.api_version.cur = $connection.api_version.max
+        }
+
         $switchstatus = Get-ArubaSWSystemStatusSwitch -connection $connection
         $connection.switch_type = $switchstatus.switch_type
 
-        if (-not $noverbose) {
-            $switchsystem = Get-ArubaSWSystem -connection $connection
+        if ('ST_STACKED' -eq $switchstatus.switch_type) {
+            if ( $switchstatus.blades.count -eq "1") {
+                $connection.product_number = $switchstatus.blades.product_number
+            }
+            else {
+                $connection.product_number = $switchstatus.blades.product_number[0]
+            }
+
+        }
+        else {
+            $connection.product_number = $switchstatus.product_number
+        }
 
+        $switchsystem = Get-ArubaSWSystem -connection $connection
 
-            if ($switchstatus.switch_type -eq "ST_STACKED") {
-                $product_name = $NULL;
-                foreach ($blades in $switchstatus.blades) {
-                    if ($blades.product_name) {
-                        if ($product_name) {
-                            $product_name += ", "
-                        }
-                        $product_name += $blades.product_name
+        if ($switchstatus.switch_type -eq "ST_STACKED") {
+            $product_name = $NULL;
+            foreach ($blades in $switchstatus.blades) {
+                if ($blades.product_name) {
+                    if ($product_name) {
+                        $product_name += ", "
                     }
+                    $product_name += $blades.product_name
                 }
             }
-            else {
-                $product_name = $switchstatus.product_name
-            }
-            Write-Output "Welcome on $($switchsystem.name) -$product_name"
-
         }
+        else {
+            $product_name = $switchstatus.product_name
+        }
+        Write-Verbose "Welcome on $($switchsystem.name) -$product_name"
 
         #Return connection info
         $connection
@@ -188,6 +227,46 @@ function Connect-ArubaSW {
     }
 }
 
+function Set-ArubaSWConnection {
+
+    <#
+        .SYNOPSIS
+        Configure Aruba SW connection Setting
+
+        .DESCRIPTION
+        Configure Aruba SW connection Setting (api_version...)
+
+        .EXAMPLE
+        Set-ArubaSWConnection -api_version 4
+
+        Configure default connection api_version to 4
+
+    #>
+
+    [CmdletBinding(SupportsShouldProcess, ConfirmImpact = 'Low')]
+    Param(
+        [Parameter(Mandatory = $false)]
+        [ValidateRange(1, 10)]
+        [int]$api_version,
+        [Parameter(Mandatory = $false)]
+        [psobject]$connection = $DefaultArubaSWConnection
+    )
+
+    Begin {
+    }
+
+    Process {
+
+        if ($PSCmdlet.ShouldProcess($connection.server, 'Set default api_version on connection')) {
+            $connection.api_version.cur = $api_version
+        }
+
+    }
+
+    End {
+    }
+}
+
 function Disconnect-ArubaSW {
 
     <#
@@ -221,7 +300,7 @@ function Disconnect-ArubaSW {
 
     Process {
 
-        $uri = "rest/v3/login-sessions"
+        $uri = "login-sessions"
 
         if ($PSCmdlet.ShouldProcess($connection.server, 'Remove Connection')) {
             $null = Invoke-ArubaSWWebRequest -method "DELETE" -uri $uri -connection $connection
diff --git a/PowerArubaSW/Public/DNS.ps1 b/PowerArubaSW/Public/DNS.ps1
index 3b804e0..95b48b6 100644
--- a/PowerArubaSW/Public/DNS.ps1
+++ b/PowerArubaSW/Public/DNS.ps1
@@ -30,7 +30,7 @@ function Get-ArubaSWDns {
 
     Process {
 
-        $uri = "rest/v4/dns"
+        $uri = "dns"
 
         $response = Invoke-ArubaSWWebRequest -method "GET" -uri $uri -connection $connection
 
@@ -90,7 +90,7 @@ function Set-ArubaSWDns {
 
     Process {
 
-        $uri = "rest/v4/dns"
+        $uri = "dns"
 
         $conf = New-Object -TypeName PSObject
 
@@ -186,7 +186,7 @@ function Remove-ArubaSWDns {
 
         $dns | Add-Member -name "dns_config_mode" -membertype NoteProperty -Value "DCM_DISABLED"
 
-        $uri = "rest/v4/dns"
+        $uri = "dns"
 
         if ($PSCmdlet.ShouldProcess($connection.server, 'Remove DNS')) {
             $null = Invoke-ArubaSWWebRequest -method "PUT" -body $dns -uri $uri -connection $connection
diff --git a/PowerArubaSW/Public/IPAddress.ps1 b/PowerArubaSW/Public/IPAddress.ps1
index 2f3902a..a46a81c 100644
--- a/PowerArubaSW/Public/IPAddress.ps1
+++ b/PowerArubaSW/Public/IPAddress.ps1
@@ -30,7 +30,7 @@ function Get-ArubaSWIpAddress {
 
     Process {
 
-        $uri = "rest/v4/ipaddresses"
+        $uri = "ipaddresses"
 
         $response = Invoke-ArubaSWWebRequest -method "GET" -uri $uri -connection $connection
 
diff --git a/PowerArubaSW/Public/LACP.ps1 b/PowerArubaSW/Public/LACP.ps1
index 4a32b1e..3ed2a9f 100644
--- a/PowerArubaSW/Public/LACP.ps1
+++ b/PowerArubaSW/Public/LACP.ps1
@@ -30,7 +30,7 @@ function Get-ArubaSWLACP {
 
     Process {
 
-        $uri = "rest/v4/lacp/port"
+        $uri = "lacp/port"
 
         $response = Invoke-ArubaSWWebRequest -method "GET" -uri $uri -connection $connection
 
@@ -84,7 +84,7 @@ function Add-ArubaSWLACP {
 
     Process {
 
-        $uri = "rest/v4/lacp/port"
+        $uri = "lacp/port"
 
         $lacp = New-Object -TypeName PSObject
 
@@ -149,7 +149,7 @@ function Remove-ArubaSWLACP {
 
         $id = $lacp.port_id
 
-        $uri = "rest/v4/lacp/port/${id}"
+        $uri = "lacp/port/${id}"
 
         if ($PSCmdlet.ShouldProcess($id, 'Remove LACP')) {
             $null = Invoke-ArubaSWWebRequest -method "DELETE" -body $lacp -uri $uri -connection $connection
diff --git a/PowerArubaSW/Public/LLDP.ps1 b/PowerArubaSW/Public/LLDP.ps1
index 28f1a00..f9609d5 100644
--- a/PowerArubaSW/Public/LLDP.ps1
+++ b/PowerArubaSW/Public/LLDP.ps1
@@ -37,7 +37,7 @@ function Get-ArubaSWLLDPRemote {
 
     Process {
 
-        $uri = "rest/v4/lldp/remote-device"
+        $uri = "lldp/remote-device"
 
         if ($port_id) {
             $uri += "/$port_id"
@@ -84,7 +84,7 @@ function Get-ArubaSWLLDPGlobalStatus {
 
     Process {
 
-        $uri = "rest/v4/lldp"
+        $uri = "lldp"
 
         $response = Invoke-ArubaSWWebRequest -method "GET" -uri $uri -connection $connection
 
@@ -138,7 +138,7 @@ function Set-ArubaSWLLDPGlobalStatus {
 
     Process {
 
-        $uri = "rest/v4/lldp"
+        $uri = "lldp"
 
         $conf = New-Object -TypeName PSObject
 
@@ -203,7 +203,7 @@ function Get-ArubaSWLLDPNeighborStats {
 
     Process {
 
-        $uri = "rest/v4/lldp/stats/device"
+        $uri = "lldp/stats/device"
 
         $response = Invoke-ArubaSWWebRequest -method "GET" -uri $uri -connection $connection
 
@@ -248,7 +248,7 @@ function Get-ArubaSWLLDPPortStats {
 
     Process {
 
-        $uri = "rest/v4/lldp/stats/ports"
+        $uri = "lldp/stats/ports"
 
         $response = Invoke-ArubaSWWebRequest -method "GET" -uri $uri -connection $connection
 
diff --git a/PowerArubaSW/Public/Led.ps1 b/PowerArubaSW/Public/Led.ps1
index 5dcc5a9..867e02f 100644
--- a/PowerArubaSW/Public/Led.ps1
+++ b/PowerArubaSW/Public/Led.ps1
@@ -38,7 +38,7 @@ function Get-ArubaSWLed {
 
     Process {
 
-        $uri = "rest/v4/led_locator_info"
+        $uri = "led_locator_info"
 
         $response = Invoke-ArubaSWWebRequest -method "GET" -uri $uri -connection $connection
 
@@ -104,7 +104,7 @@ function Set-ArubaSWLed {
 
     Process {
 
-        $uri = "rest/v4/locator-led-blink"
+        $uri = "locator-led-blink"
 
         $led = New-Object -TypeName PSObject
 
diff --git a/PowerArubaSW/Public/MacTable.ps1 b/PowerArubaSW/Public/MacTable.ps1
index 4147b01..1bbbf07 100644
--- a/PowerArubaSW/Public/MacTable.ps1
+++ b/PowerArubaSW/Public/MacTable.ps1
@@ -59,16 +59,16 @@ function Get-ArubaSWMacTable {
     Process {
 
         if ($PsBoundParameters.ContainsKey('port_id')) {
-            $uri = "rest/v4/ports/${port_id}/mac-table"
+            $uri = "ports/${port_id}/mac-table"
         }
         elseif ($PsBoundParameters.ContainsKey('vlan_id')) {
-            $uri = "rest/v4/vlans/${vlan_id}/mac-table"
+            $uri = "vlans/${vlan_id}/mac-table"
         }
         elseif ($PsBoundParameters.ContainsKey('mac_address')) {
-            $uri = "rest/v4/mac-table/${mac_address}"
+            $uri = "mac-table/${mac_address}"
         }
         else {
-            $uri = "rest/v4/mac-table"
+            $uri = "mac-table"
         }
 
         $response = Invoke-ArubaSWWebRequest -method "GET" -uri $uri -connection $connection
diff --git a/PowerArubaSW/Public/Modules.ps1 b/PowerArubaSW/Public/Modules.ps1
index a96aab7..9cb40e2 100644
--- a/PowerArubaSW/Public/Modules.ps1
+++ b/PowerArubaSW/Public/Modules.ps1
@@ -30,7 +30,7 @@ function Get-ArubaSWModules {
 
     Process {
 
-        $uri = "rest/v4/modules"
+        $uri = "modules"
 
         $response = Invoke-ArubaSWWebRequest -method "GET" -uri $uri -connection $connection
 
diff --git a/PowerArubaSW/Public/Ping.ps1 b/PowerArubaSW/Public/Ping.ps1
index a6e460a..1762759 100644
--- a/PowerArubaSW/Public/Ping.ps1
+++ b/PowerArubaSW/Public/Ping.ps1
@@ -40,7 +40,7 @@ function Test-ArubaSWPing {
 
     Process {
 
-        $uri = "rest/v4/ping"
+        $uri = "ping"
         $dest = New-Object -TypeName PSObject
 
         if ($PsBoundParameters.ContainsKey('ipv4_address')) {
diff --git a/PowerArubaSW/Public/Poe.ps1 b/PowerArubaSW/Public/Poe.ps1
index f656ab3..0697846 100644
--- a/PowerArubaSW/Public/Poe.ps1
+++ b/PowerArubaSW/Public/Poe.ps1
@@ -37,10 +37,10 @@ function Get-ArubaSWPoE {
 
     Process {
 
-        $uri = "rest/v4/poe/ports"
+        $uri = "poe/ports"
 
         if ( $port_id ) {
-            $uri = "rest/v4/ports/$port_id/poe"
+            $uri = "ports/$port_id/poe"
         }
 
         $response = Invoke-ArubaSWWebRequest -method "GET" -uri $uri -connection $connection
@@ -116,7 +116,7 @@ function Set-ArubaSWPoE {
         if ($port_poe) {
             $port_id = $port_poe.port_id
         }
-        $uri = "rest/v4/ports/${port_id}/poe"
+        $uri = "ports/${port_id}/poe"
 
         $_poe = New-Object -TypeName PSObject
 
@@ -221,10 +221,10 @@ function Get-ArubaSWPoEStats {
 
     Process {
 
-        $uri = "rest/v4/poe/ports/stats"
+        $uri = "poe/ports/stats"
 
         if ( $port_id ) {
-            $uri = "rest/v4/ports/$port_id/poe/stats"
+            $uri = "ports/$port_id/poe/stats"
         }
 
         $response = Invoke-ArubaSWWebRequest -method "GET" -uri $uri -connection $connection
diff --git a/PowerArubaSW/Public/Port.ps1 b/PowerArubaSW/Public/Port.ps1
index 6e8af8a..8a416f9 100644
--- a/PowerArubaSW/Public/Port.ps1
+++ b/PowerArubaSW/Public/Port.ps1
@@ -37,7 +37,7 @@ function Get-ArubaSWPort {
 
     Process {
 
-        $uri = "rest/v4/ports"
+        $uri = "ports"
 
         $response = Invoke-ArubaSWWebRequest -method "GET" -uri $uri -connection $connection
 
@@ -89,7 +89,7 @@ function Get-ArubaSWPortStatistics {
 
     Process {
 
-        $uri = "rest/v4/port-statistics"
+        $uri = "port-statistics"
 
         $response = Invoke-ArubaSWWebRequest -method "GET" -uri $uri -connection $connection
 
@@ -171,7 +171,7 @@ function Set-ArubaSWPort {
             $port_id = $port.id
         }
 
-        $uri = "rest/v4/ports/${port_id}"
+        $uri = "ports/${port_id}"
 
         $_port = New-Object -TypeName PSObject
 
diff --git a/PowerArubaSW/Public/RADIUSProfile.ps1 b/PowerArubaSW/Public/RADIUSProfile.ps1
index 1cb935e..521d106 100644
--- a/PowerArubaSW/Public/RADIUSProfile.ps1
+++ b/PowerArubaSW/Public/RADIUSProfile.ps1
@@ -30,7 +30,7 @@ function Get-ArubaSWRadiusProfile {
     }
 
     Process {
-        $uri = "rest/v4/radius_profile"
+        $uri = "radius_profile"
 
         $response = Invoke-ArubaSWWebRequest -method "GET" -uri $uri -connection $connection
 
@@ -100,7 +100,7 @@ function Set-ArubaSWRadiusProfile {
 
     Process {
 
-        $uri = "rest/v4/radius_profile"
+        $uri = "radius_profile"
 
         $conf = New-Object -TypeName PSObject
 
diff --git a/PowerArubaSW/Public/RADIUSServer.ps1 b/PowerArubaSW/Public/RADIUSServer.ps1
index 9ff4875..3c24779 100644
--- a/PowerArubaSW/Public/RADIUSServer.ps1
+++ b/PowerArubaSW/Public/RADIUSServer.ps1
@@ -49,7 +49,7 @@ function Get-ArubaSWRadiusServer {
     }
 
     Process {
-        $uri = "rest/v4/radius_servers"
+        $uri = "radius_servers"
 
         $response = Invoke-ArubaSWWebRequest -method "GET" -uri $uri -connection $connection
 
@@ -121,7 +121,7 @@ function Add-ArubaSWRadiusServer {
 
     Process {
 
-        $uri = "rest/v4/radius_servers"
+        $uri = "radius_servers"
 
         $conf = New-Object -TypeName PSObject
 
@@ -241,7 +241,7 @@ function Set-ArubaSWRadiusServer {
             $id = $id_server.radius_server_id
         }
 
-        $uri = "rest/v4/radius_servers/${id}"
+        $uri = "radius_servers/${id}"
 
         $conf = New-Object -TypeName PSObject
 
@@ -345,7 +345,7 @@ function Remove-ArubaSWRadiusServer {
             $id = $id_server.radius_server_id
         }
 
-        $uri = "rest/v4/radius_servers/${id}"
+        $uri = "radius_servers/${id}"
 
         if ($PSCmdlet.ShouldProcess($id, 'Remove RADIUS Server')) {
             $null = Invoke-ArubaSWWebRequest -method "DELETE" -uri $uri -connection $connection
diff --git a/PowerArubaSW/Public/RADIUSServerGroup.ps1 b/PowerArubaSW/Public/RADIUSServerGroup.ps1
index 219910d..446d42b 100644
--- a/PowerArubaSW/Public/RADIUSServerGroup.ps1
+++ b/PowerArubaSW/Public/RADIUSServerGroup.ps1
@@ -33,7 +33,7 @@ function Get-ArubaSWRadiusServerGroup {
 
     Process {
 
-        $uri = "rest/v4/radius/server_group/${server_group_name}"
+        $uri = "radius/server_group/${server_group_name}"
 
         $response = Invoke-ArubaSWWebRequest -method "GET" -uri $uri -connection $connection
 
@@ -85,7 +85,7 @@ function Add-ArubaSWRadiusServerGroup {
 
     Process {
 
-        $uri = "rest/v4/radius/server_group"
+        $uri = "radius/server_group"
 
         $conf = New-Object -TypeName PSObject
 
@@ -174,7 +174,7 @@ function Remove-ArubaSWRadiusServerGroup {
             $server_group_name = $server_group.server_group_name
         }
 
-        $uri = "rest/v4/radius/server_group/${server_group_name}"
+        $uri = "radius/server_group/${server_group_name}"
 
         if ($PSCmdlet.ShouldProcess($server_group_name, 'Remove RADIUS Server Group')) {
             $null = Invoke-ArubaSWWebRequest -method "DELETE" -uri $uri -connection $connection
diff --git a/PowerArubaSW/Public/RestTimeout.ps1 b/PowerArubaSW/Public/RestTimeout.ps1
index 8cb17e7..cf90b0d 100644
--- a/PowerArubaSW/Public/RestTimeout.ps1
+++ b/PowerArubaSW/Public/RestTimeout.ps1
@@ -29,7 +29,7 @@ function Get-ArubaSWRestSessionTimeout {
 
     Process {
 
-        $uri = "rest/v4/session-idle-timeout"
+        $uri = "session-idle-timeout"
 
         $response = Invoke-ArubaSWWebRequest -method "GET" -uri $uri -connection $connection
 
@@ -78,7 +78,7 @@ function Set-ArubaSWRestSessionTimeout {
 
     Process {
 
-        $uri = "rest/v4/session-idle-timeout"
+        $uri = "session-idle-timeout"
 
         $time = New-Object -TypeName PSObject
 
diff --git a/PowerArubaSW/Public/RestVersion.ps1 b/PowerArubaSW/Public/RestVersion.ps1
index d4673bd..86f762b 100644
--- a/PowerArubaSW/Public/RestVersion.ps1
+++ b/PowerArubaSW/Public/RestVersion.ps1
@@ -33,7 +33,7 @@ function Get-ArubaSWRestVersion {
 
         $uri = "rest/version"
 
-        $response = Invoke-ArubaSWWebRequest -method "GET" -uri $uri -connection $connection
+        $response = Invoke-ArubaSWWebRequest -method "GET" -uri $uri -connection $connection -api_version 0
 
         ($response.content | ConvertFrom-Json).version_element
     }
diff --git a/PowerArubaSW/Public/STP.ps1 b/PowerArubaSW/Public/STP.ps1
index cff2249..40d2e10 100644
--- a/PowerArubaSW/Public/STP.ps1
+++ b/PowerArubaSW/Public/STP.ps1
@@ -30,7 +30,7 @@ function Get-ArubaSWSTP {
 
     Process {
 
-        $uri = "rest/v4/stp"
+        $uri = "stp"
 
         $response = Invoke-ArubaSWWebRequest -method "GET" -uri $uri -connection $connection
 
@@ -83,7 +83,7 @@ function Set-ArubaSWSTP {
 
     Process {
 
-        $uri = "rest/v4/stp"
+        $uri = "stp"
 
         $_stp = New-Object -TypeName PSObject
 
@@ -161,7 +161,7 @@ function Get-ArubaSWSTPPort {
     Process {
 
 
-        $uri = "rest/v4/stp/ports"
+        $uri = "stp/ports"
 
         if ($port) {
             $uri += "/$port"
@@ -240,7 +240,7 @@ function Set-ArubaSWSTPPort {
 
         $_stp | Add-Member -name "port_id" -membertype NoteProperty -Value $port
 
-        $uri = "rest/v4/stp/ports/${port}"
+        $uri = "stp/ports/${port}"
 
         if ( $PsBoundParameters.ContainsKey('priority') ) {
             $_stp | Add-Member -name "priority" -membertype NoteProperty -Value $priority
diff --git a/PowerArubaSW/Public/System.ps1 b/PowerArubaSW/Public/System.ps1
index 8fabdec..36f848d 100644
--- a/PowerArubaSW/Public/System.ps1
+++ b/PowerArubaSW/Public/System.ps1
@@ -32,7 +32,7 @@ function Get-ArubaSWSystem {
 
     Process {
 
-        $uri = "rest/v4/system"
+        $uri = "system"
 
         $response = Invoke-ArubaSWWebRequest -method "GET" -uri $uri -connection $connection
 
@@ -77,7 +77,7 @@ function Set-ArubaSWSystem {
 
     Process {
 
-        $uri = "rest/v4/system"
+        $uri = "system"
 
         $system = New-Object -TypeName PSObject
 
@@ -135,7 +135,7 @@ function Get-ArubaSWSystemStatus {
             Throw "Unable to use this cmdlet, you need to use Get-ArubaSWSystemStatusGlobal"
         }
 
-        $uri = "rest/v4/system/status"
+        $uri = "system/status"
 
         $response = Invoke-ArubaSWWebRequest -method "GET" -uri $uri -connection $connection
 
@@ -169,7 +169,7 @@ function Get-ArubaSWSystemStatusSwitch {
 
     Process {
 
-        $uri = "rest/v4/system/status/switch"
+        $uri = "system/status/switch"
 
         $response = Invoke-ArubaSWWebRequest -method "GET" -uri $uri -connection $connection
 
@@ -210,7 +210,7 @@ function Get-ArubaSWSystemStatusGlobal {
         if ('ST_STANDALONE' -eq $connection.switch_type -or 'ST_CHASSIS' -eq $connection.switch_type) {
             Throw "Unable to use this cmdlet, you need to use Get-ArubaSWSystemStatus"
         }
-        $uri = "rest/v4/system/status/global_info"
+        $uri = "system/status/global_info"
 
         $response = Invoke-ArubaSWWebRequest -method "GET" -uri $uri -connection $connection
 
diff --git a/PowerArubaSW/Public/Trunk.ps1 b/PowerArubaSW/Public/Trunk.ps1
index 097e2a3..1c4273b 100644
--- a/PowerArubaSW/Public/Trunk.ps1
+++ b/PowerArubaSW/Public/Trunk.ps1
@@ -30,7 +30,7 @@ function Get-ArubaSWTrunk {
 
     Process {
 
-        $uri = "rest/v4/trunk/port"
+        $uri = "trunk/port"
 
         $response = Invoke-ArubaSWWebRequest -method "GET" -uri $uri -connection $connection
 
@@ -85,7 +85,7 @@ function Add-ArubaSWTrunk {
 
     Process {
 
-        $uri = "rest/v4/trunk/port"
+        $uri = "trunk/port"
 
         $trunk = New-Object -TypeName PSObject
 
@@ -149,7 +149,7 @@ function Remove-ArubaSWTrunk {
 
         $id = $trunk.port_id
 
-        $uri = "rest/v4/trunk/port/${id}"
+        $uri = "trunk/port/${id}"
 
         if ($PSCmdlet.ShouldProcess($id, 'Remove Trunk')) {
             $null = Invoke-ArubaSWWebRequest -method "DELETE" -body $trunk -uri $uri -connection $connection
diff --git a/PowerArubaSW/Public/Vlans-Ports.ps1 b/PowerArubaSW/Public/Vlans-Ports.ps1
index a58b949..ee15600 100644
--- a/PowerArubaSW/Public/Vlans-Ports.ps1
+++ b/PowerArubaSW/Public/Vlans-Ports.ps1
@@ -43,7 +43,7 @@ function Add-ArubaSWVlansPorts {
 
     Process {
 
-        $uri = "rest/v4/vlans-ports"
+        $uri = "vlans-ports"
 
         $vlanports = New-Object -TypeName PSObject
 
@@ -109,7 +109,7 @@ function Get-ArubaSWVlansPorts {
 
     Process {
 
-        $uri = "rest/v4/vlans-ports"
+        $uri = "vlans-ports"
 
         $response = Invoke-ArubaSWWebRequest -method "GET" -uri $uri -connection $connection
         $vlansports = ($response.Content | ConvertFrom-Json).vlan_port_element
@@ -174,7 +174,7 @@ function Set-ArubaSWVlansPorts {
             $vlan_id = $vlanports.vlan_id
             $port_id = $vlanports.port_id
         }
-        $uri = "rest/v4/vlans-ports/${vlan_id}-${port_id}"
+        $uri = "vlans-ports/${vlan_id}-${port_id}"
 
         $_vlanport = New-Object -TypeName PSObject
 
@@ -245,7 +245,7 @@ function Remove-ArubaSWVlansPorts {
             $port_id = $vlanport.port_id
         }
 
-        $uri = "rest/v4/vlans-ports/${vlan_id}-${port_id}"
+        $uri = "vlans-ports/${vlan_id}-${port_id}"
 
         if ($PSCmdlet.ShouldProcess("${vlan_id}-${port_id}", 'Configure Vlans Ports')) {
             $null = Invoke-ArubaSWWebRequest -method "DELETE" -uri $uri -connection $connection
diff --git a/PowerArubaSW/Public/Vlans.ps1 b/PowerArubaSW/Public/Vlans.ps1
index c9c942b..66fcaed 100644
--- a/PowerArubaSW/Public/Vlans.ps1
+++ b/PowerArubaSW/Public/Vlans.ps1
@@ -41,7 +41,7 @@ function Add-ArubaSWVlans {
 
     Process {
 
-        $uri = "rest/v4/vlans"
+        $uri = "vlans"
 
         $vlan = New-Object -TypeName PSObject
 
@@ -135,7 +135,7 @@ function Get-ArubaSWVlans {
 
     Process {
 
-        $uri = "rest/v4/vlans"
+        $uri = "vlans"
 
         $response = Invoke-ArubaSWWebRequest -method "GET" -uri $uri -connection $connection
 
@@ -202,7 +202,7 @@ function Set-ArubaSWVlans {
             $id = $vlan.vlan_id
             $oldname = $vlan.name
         }
-        $uri = "rest/v4/vlans/${id}"
+        $uri = "vlans/${id}"
 
         $_vlan = New-Object -TypeName PSObject
 
@@ -303,7 +303,7 @@ function Remove-ArubaSWVlans {
             $id = $vlan.vlan_id
         }
 
-        $uri = "rest/v4/vlans/${id}"
+        $uri = "vlans/${id}"
 
         $target = "Vlan ID {0}" -f $id
         if ($PSCmdlet.ShouldProcess($target, "Remove VLAN")) {
diff --git a/Tests/integration/Connection.Tests.ps1 b/Tests/integration/Connection.Tests.ps1
index d47d7d0..0361f22 100644
--- a/Tests/integration/Connection.Tests.ps1
+++ b/Tests/integration/Connection.Tests.ps1
@@ -7,13 +7,15 @@
 
 Describe  "Connect to a switch (using HTTP)" {
     It "Connect to a switch (using HTTP) and check global variable" {
-        Connect-ArubaSW $invokeParams.server -Username $invokeParams.Username -password $invokeParams.password -httpOnly -noverbose
-        $DefaultArubaSWConnection | Should -Not -BeNullOrEmpty
+        Connect-ArubaSW $invokeParams.server -Username $invokeParams.Username -password $invokeParams.password -api_version 3 -httpOnly
         $DefaultArubaSWConnection.server | Should -Be $invokeParams.server
         $DefaultArubaSWConnection.cookie | Should -Not -BeNullOrEmpty
         $DefaultArubaSWConnection.port | Should -Be "80"
         $DefaultArubaSWConnection.httpOnly | Should -Be $true
         $DefaultArubaSWConnection.session | Should -Not -BeNullOrEmpty
+        $DefaultArubaSWConnection.api_version.min | Should -Not -BeNullOrEmpty
+        $DefaultArubaSWConnection.api_version.max | Should -Not -BeNullOrEmpty
+        $DefaultArubaSWConnection.api_version.cur | Should -Be "3"
     }
     It "Disconnect to a switch (using HTTP) and check global variable" {
         Disconnect-ArubaSW -confirm:$false
@@ -25,13 +27,16 @@ Describe  "Connect to a switch (using HTTP)" {
 Describe  "Connect to a switch (using HTTPS)" {
     #TODO Try change port => Need AnyCLI
     It "Connect to a switch (using HTTPS and -SkipCertificateCheck) and check global variable" -Skip:($httpOnly) {
-        Connect-ArubaSW $invokeParams.server -Username $invokeParams.Username -password $invokeParams.password -SkipCertificateCheck -noverbose
+        Connect-ArubaSW $invokeParams.server -Username $invokeParams.Username -password $invokeParams.password -api_version 3 -SkipCertificateCheck
         $DefaultArubaSWConnection | Should -Not -BeNullOrEmpty
         $DefaultArubaSWConnection.server | Should -Be $invokeParams.server
         $DefaultArubaSWConnection.cookie | Should -Not -BeNullOrEmpty
         $DefaultArubaSWConnection.port | Should -Be "443"
         $DefaultArubaSWConnection.httpOnly | Should -Be $false
         $DefaultArubaSWConnection.session | Should -Not -BeNullOrEmpty
+        $DefaultArubaSWConnection.api_version.min | Should -Not -BeNullOrEmpty
+        $DefaultArubaSWConnection.api_version.max | Should -Not -BeNullOrEmpty
+        $DefaultArubaSWConnection.api_version.cur | Should -Be "3"
     }
     It "Disconnect to a switch (using HTTPS) and check global variable" -Skip:($httpOnly) {
         Disconnect-ArubaSW -confirm:$false
@@ -40,25 +45,33 @@ Describe  "Connect to a switch (using HTTPS)" {
     #This test only work with PowerShell 6 / Core (-SkipCertificateCheck don't change global variable but only Invoke-WebRequest/RestMethod)
     #This test will -Be fail, if there is valid certificate...
     It "Connect to a switch (using HTTPS) and check global variable" -Skip:($httpOnly -Or "Desktop" -eq $PSEdition) {
-        { Connect-ArubaSW $invokeParams.server -Username $invokeParams.Username -password $invokeParams.password -noverbose } | Should -Throw "Unable to connect (certificate)"
+        { Connect-ArubaSW $invokeParams.server -Username $invokeParams.Username -password $invokeParams.password } | Should -Throw "Unable to connect (certificate)"
     }
 }
 
-Describe  "Connect to a switch (using multi connection)" {
+Describe  "Connect to a switch (using multi connection and multi version)" {
     It "Connect to a switch (using HTTP and store on sw variable)" {
-        $script:sw = Connect-ArubaSW $invokeParams.server -Username $invokeParams.Username -password $invokeParams.password -httpOnly -noverbose -DefaultConnection:$false
+        $script:sw = Connect-ArubaSW $invokeParams.server -Username $invokeParams.Username -password $invokeParams.password -api_version 3 -httpOnly -DefaultConnection:$false
         $DefaultArubaSWConnection | Should -BeNullOrEmpty
         $sw.server | Should -Be $invokeParams.server
         $sw.cookie | Should -Not -BeNullOrEmpty
         $sw.port | Should -Be "80"
         $sw.httpOnly | Should -Be $true
         $sw.session | Should -Not -BeNullOrEmpty
+        $sw.api_version.min | Should -Not -BeNullOrEmpty
+        $sw.api_version.max | Should -Not -BeNullOrEmpty
+        $sw.api_version.cur | Should -Be "3"
     }
 
     It "Throw when try to use Invoke-ArubaSWWebRequest and not connected" {
         { Invoke-ArubaSWWebRequest -uri "rest/v4/vlans" } | Should -Throw "Not Connected. Connect to the Switch with Connect-ArubaSW"
     }
 
+    It "use Set-ArubaSWConnection to change api_version (v4)" {
+        Set-ArubaSWConnection -api_version 4 -connection $sw
+        $sw.api_version.cur | Should -Be "4"
+    }
+
     Context "Use Multi connection for call some (Get) cmdlet (Vlan, System...)" {
         It "Use Multi connection for call Get vlans" {
             { Get-ArubaSWVlans -connection $sw } | Should -Not -Throw