Mixing layer-3 and layer-2 over a single aggregated link? Possible???
I have tried a strange combination recently and was very surprised to see that it works - mixing layer-2 and layer-3 over an LACP aggregated interface. I have no explanation why it works. Does any of my reader have any idea? Let's introduce our topology first- Fig 01 - Link-aggregation Topology Now the problem definition - We are using two Arista switches. In Arista-SW-L3 we will create a L3 (layer 3) link-aggregation and in Arista-SW-L2 we will create a L2 (layer 2) link-aggregation over the same pair of interfaces ( eth1 and eth2 ). Then we will verify the connectivity by doing ping from the L2 side (vlan interfaces) to the L3 side (port-channel interfaces). And come to conclusion that we can mix and match L2 and L3 over a single link-aggregation interface. Let's configure the L3 side of our aggregated link - Arista-SW-L3 configuration We configure the switch by running the following commands - interface Ethernet1 no switchport...