Openshift pod communication is not working due to ARP failures between a node and its pods.
Issue
-
Network communication with a pod is completely broken or intermittent. Investigation shows the node hosting the pod has a neighbour table with failed ARP entries for the affected pods.
$ ip neigh show nud failed 10.128.2.40 dev tun0 FAILED 10.128.2.20 dev tun0 FAILED 10.128.2.30 dev tun0 FAILED
Environment
- Red Hat OpenShift Container Platform (OCP) 3.11
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