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CI: Conformance Cluster Mesh (ci-clustermesh): no-unexpected-packet-drops/no-unexpected-packet-drops: No mapping for NAT masquerade #30139

@christarazi

Description

@christarazi

CI failure

Run cilium --context kind-cluster1-7455128934 connectivity test --hubble=false --flow-validation=disabled --multi-cluster=kind-cluster2-7455128934 --external-target=google.com --collect-sysdump-on-failure \
  cilium --context kind-cluster1-7455128934 connectivity test --hubble=false --flow-validation=disabled --multi-cluster=kind-cluster2-7455128934 --external-target=google.com --collect-sysdump-on-failure \
  --junit-file "cilium-junits/Installation and Connectivity Test (6, vxlan, ipv4, disabled, none, false, cluster, cluster, 511).xml" \
  --junit-property github_job_step="Run connectivity test (6, vxlan, ipv4, disabled, none, false, cluster, cluster, 511)"
...
⌛ [kind-cluster1-7455128934] Waiting for Service cilium-test/echo-other-node to be synchronized by Cilium pod kube-system/cilium-g767f
ℹ️  Skipping IPCache check
ℹ️  Cilium version: 1.16.0
🏃 Running 64 tests ...
[=] Test [no-unexpected-packet-drops] [1/64]

  [-] Scenario [no-unexpected-packet-drops/no-unexpected-packet-drops]
  🟥 Found unexpected packet drops:
{
  "labels": {
    "direction": "EGRESS",
    "reason": "No mapping for NAT masquerade"
  },
  "name": "cilium_drop_count_total",
  "value": 1
}

cilium-sysdumps.zip

https://github.com/cilium/cilium/actions/runs/7455128934

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    area/CIContinuous Integration testing issue or flakearea/datapathImpacts bpf/ or low-level forwarding details, including map management and monitor messages.ci/flakeThis is a known failure that occurs in the tree. Please investigate me!feature/snatRelates to SNAT or Masquerading of trafficstaleThe stale bot thinks this issue is old. Add "pinned" label to prevent this from becoming stale.

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