Can you run VRRP with only one router on a 4451-X?

[bhallman]

Is it possible to use VRRP with 2 different interfaces on the same router? The hope is to use 1 4451-X with 2 interfaces going to a switch stack so that if a link fails the VRRP will allow the traffic to use the other interface elsewhere in the stack.

[rais]

You can use SVI IP address instead.

HTH

[Francesco Molino]

Hi

If you connect your router to a stack using 2 physical links, then just do a routed port-channel (L3).
And if 1 link goes down, the traffic will flow on the remaining link. If both are up, load balancing algorithm will be charge to make traffic using both links.

To do vrrp, it means you'll have 2 interfaces on the same router within the same subnet and the router won't allow you to do such config.

[nazimkha]

you can use a simple port-channel between the 4451-X and the stack switches

[JimBrownSr1970]

You can create a separate VRF for each interface & create the VRRP groups as needed. This is a *very* basic example & just off the top of my head.

Ex:
vrf definition Site1
 address-family ipv4
!
vrf definition Site2
 address-family ipv4
!
interface Gig0/0/1
 vrf forwarding Site1
 ip address 192.168.1.2 255.255.255.0
 vrrp 1 ip 192.168.1.1
 vrrp 1 priority 110
!
interface Gig0/0/2
 vrf forwarding Site2
 ip address 192.168.1.3 255.255.255.0
 vrrp 1 ip 192.168.1.1

[DanielP211]

Hello!

As other noted you should use port-channel. Using two L3 interfaces you will have to setup routing and wont be able to use them both at the same time.

BR

[MHM Cisco World]

Stack can have two port in two different SW within same PortChannel 

And hence you can config ISR portchannel using two interface with mode ON toward two different SW of stack.

I Prefer make it L3 portchannel not l2 and config SVI 

[Joseph W. Doherty]

As others have already noted, using a Etherchannel (MEC on the switch side) would normally be the preferred approach.

Many Cisco ISRs supported a manual Etherchannel but I recall (?) reading, on these forums, later ISRs might now support LACP.