IWAN Master controller redundancy

[carl_townshend]

Hi

I am currently looking at implementing an IWAN solution.

I have a question about the master controller, what would basically happen if we lost the master controller?

would we just lose the performance routing and would all traffic stay as is?

also, how is the traffic monitored? do the border routers measure the metrics between branch BR and Hub BR and then report to the MC?

cheers

[Menelaos Sazos]

It's exact the same as with PfR - if you need MC redundancy, make it with HSRP or Anycast Loopback. For Geo-redundant MC you then need a way to make an L2 tunnel between the two for HSRP or regular routing metrics for the Anycast.

[vamikhai]

Hello.

PFRv3 MC HA supports "anycast loopback" only (while HSRP is an option for PFRv2).

Also "anycast" is done not per metric, but per prefix-length: primary MC advertises /32 and standby - /31 prefix.

Best regards.