A question about VRRP instances/groups and a request for suggestions from the Community.
Equipment: Cisco 7609, Cisco NCS-55A2, Cisco Nexus 5596
Is VRRP limited to 255 instances? Is there a difference between a VRRP instance and a VRRP group?
If there are two interfaces, can VRRP have 255 instances/groups per interface? A total of 510?
Scenario:
Cellular service provider with radio towers in many locations. Upwards of 640+ nodes. All nodes travel to a Ciena (I don't know the model) and then layer two to the Nexus. From there they travel to their layer 3 gateway which is a Cisco 7609. Single gateway. /30 network. One IP on the node. One IP on the router. Single SVI on the router. No redundancy. No failover.
We are moving this entire cellular node network to a pair of NCS 55A2 routers and a /29 network. The node traffic will come from the Ciena straight into the NCS routers. No other hops. We had planned on using sub-interfaces on the NCS routers with FHRP to provide failover. If there are limits with VRRP, this no longer becomes a really viable option, short of adding an additional link to each NCS router per 255 VRRP instances.
A sales engineer has suggested EVPN, but we haven't gotten our heads around that yet.
Any suggestions or advice? Any EVPN guidance?
Thanks in advance.
