Active cluster node not switching back to primary ISP even though circuit is up

[Joe_Kanaszka]

Good morning!

Two-node active/standby cluster running R81.20 Take 53.

ISP redundancy enabled  - configured and working properly (until yesterday  🙂 )

Advanced tab in ISP redundancy set to ping main ISP's gateway:

ISP Redundancy

Advanced tab - monitoring Verizon gateway

Standyby node

Active node

As you can see - my Active node still thinks my main ISP link is down - even though it's not.  I can ping the ISP gateway from both nodes.

Sync issue?  How do I resolve?

Thank you all!

[Lesley · Accepted solution]

Confirm with packet capture if the gateway is trying to probe the IP on the correct interface.

Also reason why you can ping it is maybe you probe the ISP-1 host via ISP-2

Only capture can show you if it is routed correctly. 

After that check https://support.checkpoint.com/results/sk/sk65341

[Joe_Kanaszka]

This was the answer.  Thank you Lesley!