I have 3 sites A, B, and C. Each has a 3512G switch at the core and 3 2950s that tie back to the 3512 via fiber. Sites A and B need to connect to C via fiber. Each site is going to be on a different subnet so I need to enable routing between them. On the 3512's at both A and B, I know I can use one gigabitethernet port as a layer 3 port, give it an IP address and give each 3512 a route to the IP of the gigethernet port at site C that they are connected to. On the 3512 at the central site (site C) what route statements do I need? I know I need one to route to the subnet in site A, one to route to the subnet in site B, but what do I need to allow traffic destined for site C to go out to the 2950's that are connected to 3 of the 10 GBIC ports. These 3 ports are layer 2 ports, part of VLAN1 (the only VLAN). Is is possible to have a route statement send traffic to subnet 192.168.64.0 out interface VLAN1? I'm not sure if this will work because VLAN1 is not a Layer3 interface.
Not sure which platform you are referring to but the 3512XL and the 3508G-XL (gig only) do not support L3 ports. It is a L2 access switch. You will need to connect a router to each switch to accomplish what you are trying to do.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...