Inter Vlan Routing with this config

[trickylalit]

Hello All,

I am looking for some clarification,  I understand two Vlan need a layer three device to allow routing between them.

So wanted to check if this set up works or not.

Router - Switch A-SwitchB-SwitchC

All link between router and switch are trunk ports and lets says  we have VLAN 10, 20 on switch C

And two interface for Router A for these VLan.

Can device belonging to two different VLAN on Switch C communicate?

If not why. I guess, I am trying to rationalize is Traffic belonging to VLAN 10 flows through trunk and reach router  and gets directed back through same trunk to reach router

Please clarify.

Thanks,

L

[chrihussey · Accepted solution]

Yes they should be able to communicate if done correctly. VLAN 10 and 20 need to be trunked through all the switches to the router with the L3 interface.

So for host on VLAN 10 to get to a host on VLAN 20, the packet would take VLAN 10 across all the switches to the router, where it would get "routed" to VLAN 20 and then back across the switches to the VLAN 20 host.

[trickylalit]

Thank you.