I have read all I can on GLBP without a definitive answer to my question. I have two 7613 routers connected to two 7304's that serve as our gateways to the ISP. I would like to run these connections through a 6509VSS and run GLBP on all 4 routers in the following manner.
I would like to connect 4 routers to the VSS, place their interfaces into the SAME subnet but running a different GLBP group as below
7613: Virtual IP for Group 1 7613:
172.30.100.65/28 GLBP 1 IP 172.30.100 66 172.30.100.70/28
VSS Layer 2 only and used to connect all devices into the same vlan 2010
172.30.100.73/28 GLBP 2 IP 172.30.100.75 172.30.100.78/28
76XX: Virtual IP for group 2 76XX:
The subnet is 172.30.100.64/28 ( .65 - .78 )
My question is whether the two groups of GLBP instances can coexist within the same subnet using 4 routers. My goal is to have one gateway address for each side. The 76XX routers represent the AT&T routers facing their MPLS network. I want to do load balancing across those routers for outbound traffic and my 7613's to load balance the return traffic.
I am running GLBP in my core between the two 7613's and multiple 3750me switches that provide a very high level of redundancy. I'm just not sure if the scenario above is supported.
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