Why did static NAT translations stop working on a Cisco router?

Question

Cisco

Good afternoon.
Tell me which way to dig - I've been fighting for 2 days, nothing worthwhile comes out. The essence of the problem:
We have a Cisco 2921 router configured to work with 2 providers, cef per-destination works. The setup is performed by analogy with www.cisco.com/c/en/us/support/docs/ip/network-addr... optics, one has a DHCP address, the other has a static address isp2.isp2.isp2.isp2/30), with the same metrics:
...
ip route 0.0.0.0 0.0.0.0 isp1.isp1.isp1.isp1
ip route 0.0.0.0 0.0.0.0 isp2.isp2.isp2.isp2
...
In addition to dynamic NAT, there are static NAT rules. Everything worked fine until 1 fine moment, but now static translations through the isp2 provider have stopped working - but translations are displayed in ip nat translations - they were created correctly, but the client does not receive a response and leans back on a timeout. At the same time, through isp1 - everything works fine (static translations are made in the same way through both wires). If I delete the default route through isp1, then NAT translations through isp2 start working without problems. It is also quite curious that NAT does not return the correct response to a request through isp2 (if both default routes are registered) only if clients knock from any other providers, but from clients of the same provider (isp2) - everything is ok. If you need a specific example of a config, I'm ready to provide it. I would be grateful for any hints

Answer 1

The link you have is wrong, so post the config.
Judging by the symptoms, route-maps do not work correctly for you, and responses to packets that came through the second provider go through the first one.