This epic tracks all the effort needed to deliver the solution related to the bug described below.

 Problem Description: Clearly explain the issue.

When incorrectly configured to use an invalid VRF ID (https://github.com/ovn-org/ovn/blob/c73f7912665d6a6e935c7c8aeae8389c059e9ddb/controller/route-exchange-netlink.c#L41) ovn-controller tries to create the VRF and fails.

It then continuously retries, wasting CPU on operations that would fail anyway.

 Impact Assessment: Describe the severity and impact (e.g., network down,availability of a workaround, etc.).

Not that severe as it happens when invalid VRF IDs are used.

 Software Versions: Specify the exact versions in use (e.g.,openvswitch3.1-3.1.0-147.el8fdp).

ovn25.03, including ovn25.03-25.03.1-86.el9fdp

  Issue Type: Indicate whether this is a new issue or a regression (if a regression, state the last known working version).

Day one issue

 Reproducibility: Confirm if the issue can be reproduced consistently. If not, describe how often it occurs.

Yes.

 Reproduction Steps: Provide detailed steps or scripts to replicate the issue.

Use the following ovn configuration and check logs on chassis-1:

ovn-nbctl lr-add lr                                          \
  -- set logical_router lr options:dynamic-routing=true      \
                           options:chassis=chassis-1         \
                           options:requested-tnl-key=253     \
  -- lrp-add lr lrp 00:00:00:00:00:01 1.1.1.1/24             \
    -- lrp-set-options lrp dynamic-routing-maintain-vrf=true \
  -- ls-add ls                                               \
    -- lsp-add ls lsp                                        \
    -- lsp-set-type lsp router                               \
    -- lsp-set-addresses lsp router                          \
    -- lsp-set-options lsp router-port=lrp
 

 Expected Behavior: Describe what should happen under normal circumstances.

ovn-controller should log the warning that the VRF ID 253 is not valid but shouldn't keep retrying to configure the invalid value.

 Observed Behavior: Explain what actually happens.

ovn-controller loops and retries the invalid configuration continuously, hogging CPU:

2025-10-20T10:39:16.565Z|00077|route_exchange|WARN|Unable to create VRF ovnvrf253 for datapath 253: Invalid argument.
2025-10-20T10:39:16.566Z|00078|route_exchange_netlink|WARN|attempt to create VRF using invalid table id 253
2025-10-20T10:39:16.566Z|00079|route_exchange|WARN|Unable to create VRF ovnvrf253 for datapath 253: Invalid argument.
2025-10-20T10:39:16.566Z|00080|route_exchange_netlink|WARN|attempt to create VRF using invalid table id 253
2025-10-20T10:39:16.566Z|00081|route_exchange|WARN|Unable to create VRF ovnvrf253 for datapath 253: Invalid argument.
2025-10-20T10:39:20.623Z|00082|poll_loop|INFO|wakeup due to 0-ms timeout at controller/route-exchange.c:256 (98% CPU usage) 

 Troubleshooting Actions: Outline the steps taken to diagnose or resolve the issue so far.

 Logs: If you collected logs please provide them (e.g. sos report, /var/log/openvswitch/* , testpmd console)