CI job deploying NLB with custom EIP is failing the following e2e test:
[sig-network][Feature:Router] The HAProxy router should expose prometheus metrics for a route [apigroup:route.openshift.io] [Skipped:Disconnected] [Suite:openshift/conformance/parallel]

Looks like the test is using proxy by default regardless the LB type, but the ingress with NLBs don't use proxy protocol: https://github.com/openshift/release/pull/56960#issuecomment-2580577276

    4.17

    always

    1. install a cluster with NLB as LB type for the default router (creating manifests [or install-config?])

Directly:
    2. run: curl --haproxy-protocol -s -m 5 -o /dev/null -w '%{http_code}\n' --header 'Host: <app_fqdn>' http://<host_ip_of_cluster_network_CIDR>
Ex: curl --haproxy-protocol -s -m 5 -o /dev/null -w '%{http_code}\n' --header 'Host: weightedroute-e2e-test-router-metrics-f5bnt.apps.ci-op-pjzkc0n7-eb839.origin-ci-int-aws.dev.rhcloud.com' http://10.128.2.6

Through test suite:
    2. run e2e suite openshift/conformance
    3. check the result of e2e test "[sig-network][Feature:Router] The HAProxy router should expose prometheus metrics for a route [apigroup:route.openshift.io] [Skipped:Disconnected] [Suite:openshift/conformance/parallel]"     

exit 1
command terminated with exit code 1
error:
exit status 1
400"

    Successful request

- CI step customizing the manifest to create NLB: https://github.com/openshift/release/pull/56960/files#diff-e9ab36f1ce5c8d52342ae87231516b1d1370671e86827106c91ce639a3a6157d
- Previous investigation: 
1.https://github.com/openshift/release/pull/56960#issuecomment-2465480534
2. https://github.com/openshift/release/pull/56960#issuecomment-2578708810
3. https://github.com/openshift/release/pull/56960#issuecomment-2580577276