QinQ Configuration

qinq configuration qinq configuration show interface vlan stack show interface vlan stack \[command] show interface vlan stack \[purpose] view the vlan stack function configuration of the interface \[view] system view \[use cases] sonic# show interface vlan stack name vlan stack vlan remark 8021p remark tc mode \ ethernet1 100 101 null null tagged ethernet1 300 101 null null tagged ethernet1 400 101 null null tagged show interface qinq protocol \[interface name] show interface qinq protocol \[interface name] \[command] show interface qinq protocol \[interface name] \[purpose] view the qinq protocol configuration of the interface \[view] system view \[use cases] sonic# show interface qinq protocol 1 name protocol \ ethernet1 0x88a8 qinq enable qinq enable \[command] qinq enable \[purpose] enable basic qinq functionality on the interface \[view] interface view \[usage scenario] when the port enable switch is activated, all traffic entering the device from this port will be tagged with an additional layer corresponding to the port vlan id (pvid) if the packet does not have a vlan tag, it will be encapsulated with a layer corresponding to the pvid vlan if the packet already carries a vlan tag, an additional layer corresponding to the pvid vlan will be added \[use cases] sonic(config)# interface ethernet 1 sonic(config if 1)# qinq enable vlan stack {tagged|untagged} vlan id stack id \[remark dot1p value] \[remark tc vlan stack {tagged|untagged} vlan id stack id \[remark dot1p value] \[remark tc value ] \[command] vlan stack {tagged|untagged} vlan id stack id \[remark dot1p value ] \[remark tc value ] no vlan stack untagged no vlan stack tagged {all| vlan id } \[purpose] configure the vlan stack function of the interface \[parameter] parameter parameter description description tagged interface received messages with vlan tag need to be overlaid as a two layer vlan untagged interface receives messages without vlan tags that require stacking two layer vlans vlan id vlan id of interface received with vlan tag packets or inner vlan id after qinq encapsulation of packets without vlan tag stack id specify the outer vlan tag after stacking remark dot1p value modify the 802 1p priority of the outer vlan tag remrak tc value modify the priority of packets for local processing \[view] interface view \[usage scenario] vlan stacking is a layer 2 technology that allows the encapsulation of user packets with an outer vlan tag based on the user's vlan id this helps differentiate between different users' packets \[notes] to enable vlan stacking, it should be configured in the inbound direction if incoming packets are already vlan tagged, ensure that the tpid (tag protocol identifier) used for the outer vlan tag is different from the tpid configured on the interface if user need to remove the outer vlan tag, the interface should join the stacked vlan with an untagged mode if user don't need to remove the outer vlan tag, the interface should join the stacked vlan with a tagged mode \[use cases] sonic(config)# interface ethernet 1 sonic(config if 1)# qinq protocol 0x88a8 sonic(config if 1)# switchport access vlan 101 sonic(config if 1)# vlan stack tagged 100 101 remark dot1p 4 remark tc 4