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Unable to ping single router backup (ISP2) interface from outside

We have a single router with 3 interfaces: one for inside, one for ISP1 and one for ISP2

We are doing simple failover in the following way:

ip route isp1_gateway

ip route isp2_gateway 200


From the internet, we can ping router interface that points to ISP1 however we can not ping router interface that points to ISP2. This I believe is expected, however there is a way to have the router respond to icmp requesst on the interface that faces ISP2, even though that interface is not the "Active" one. I believe this is doable via PBR.


Can you help with this?


thank you in advance

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