Help Needed with VRRP Failover on WAN Side Using Cisco vManage SD-WAN

[banoosh]

Hi Cisco Community,

We’ve set up VRRP on the LAN side successfully, but we’re facing issues with the WAN side while using Cisco vManage SD-WAN. The failover isn't working as expected from the WAN side, and we’re not sure what could be causing this issue.

Has anyone experienced a similar problem or can provide insights on troubleshooting VRRP failover issues on the WAN side in a Cisco SD-WAN environment? Any advice or guidance would be greatly appreciated!

Thank you in advance!

[balaji.bandi]

We need more information and topology how that was configured and connected.

If you deployed correctly you do not need VRRP for the SD-WAN Lan side, depends on the IGP you using should able to meet the requirement, why are we suing VRRP here, what is the requirement ?

check the configuration guide :

https://www.cisco.com/c/en/us/td/docs/routers/sdwan/configuration/system-interface/vedge-20-x/systems-interfaces-book/m-vrrp-tracking.html

https://www.youtube.com/watch?v=WrNfvmrV4-8

[Kanan Huseynli]

Hi,

in the basic form you need to track OMP. So, if WAN fails but LAN is running, then failover occurs.

Plus, there is tloc-change feature which makes symmetric traffic flow from lan <> wan with respect to site VRRP router

 vrrp 1 address-family ipv4
vrrpv2
address a.b.c.d
priority XX
track omp decrement 20 > this means that, if router loses all OMP sessions, it decrements priority, so secondary router takes the master role
tloc-change increase-preference 10 > this means that, if router is master in LAN it increases WAN interfaces' TLOC preference +10, so inbound traffic from overlay come to master router, purpose is to keep symmetricy

[banoosh]

Hi,

I’m reaching out for some insights regarding the holdtime configuration for OMP. We’re considering setting the holdtime to 0 and would like to understand the potential impact on both the site and WAN side.

Could someone clarify what it means to set the holdtime to 0 instead of a specific number? Additionally, are there any known implications for stability or connectivity when the holdtime is set to 0?

Any advice or experiences would be greatly appreciated