03-11-2022 06:28 AM
Hi everyone!
Imagine there are 2 routers configured with HSRP with IP addresses R-01 (active) 10.0.0.1, R-02 (standby) 10.0.0.2 and VIP 10.0.0.5.
A third router R-03 (10.0.0.3) estabilishes BGP neighborship with the virtual IP address (10.0.0.5) and then the R-01 fails.
The router R-02 would be able to communicate properly?
I think that if while R-01 is the active, the Routing Table of R-02 would be empty.
I imagine that after the switchover, R-02 will begin to learn routes from BGP and it might take some time until the network continue to communicate properly.
Is there a way to sync the routing table of R-02 with R-01 while R-02 is still the standby?
Please let me know if there is another routing protocol or a better design to this case.
Thank you in advance!!!
03-11-2022 06:39 AM
03-11-2022 08:57 AM - edited 03-11-2022 10:10 AM
Hi,
So you basically want to establish a BGP peer with a virtual IP.
you can do it and it will work but convergence will be slower than if you had a BGP session between R-03 - R-01 and another one between R-03 - R-02 because BGP session will need to reestablish when a fail over occurs.
Of course it is advisable to add a BGP peer between R-01 and R-02.
You have enough features that can give you a quick answer in case of R-01 or R-02 peer is down. BFD for BGP for example.
BFD for BGP is a significantly faster convergence time then HSRP timers.
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide