To to pick your brain i have 2 pairs of dark fibers between two datacenters. Dark fibers are terminating on 8 Port channel CWDM and have two pairs of catalyst 6509 switches connecting to the CWDM using 2 channels each at each datacenters. The connection between the 6509's via CWDM are Layer 3 routing usinf EIGRP. I would like to also have a layer 2 connecting between the datacenters since i have few spare channels on the CWDM for server clustering ( two servers between DC need to be on same subnet) and don't want to encounter any STP issues between the 6509 switches. How can i achieve this?
Dont have any layer 2 connection on the 6500's since they are core and connect another pairs of Catalyst 4507 at each datacenter to the spare channels on the CWDM and have a layer 2 trunk between the datacenters from the catalyst 4507 acting as a distribution switches passing frames between the two servers via layer 2 for vlan 95 and have the 4507 connect to the Core 6509 via layer 3 routing. So the cat catalyst 4707 will act as a distribution and access.
will my idea work?