Network Issues Pod-to-Pod Network in Calico

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1

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Hello Community,

I have a cluster which is based on three control nodes and two worker nodes, so currently i am having a trouble to send ping request pod-to-pod(ICMP) and also some dns nslookup inconsistency,

I can see the logs in node, that is applyling policies to drop the ICMP packets in calico network, i also think it is normal for security

and i want to inform that my kube-system pods and calico-nodes have host network IP public range(192.168.x.x)
calico-kube-controller and coredns pods are pod IP(172.16.x.x) range assigned, so in a way, pod IP can not reach host DNS server IP.

and last but not least, all pods are working.

Cluster information: Bare metal, 3 control nodes and 2 worker nodes

Kubernetes version: 1.29.15
Installation method:
Host OS: Rocky Linux 8
CNI and version: Calico 3.30.3
CRI and version: Containerd 1.6.32

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Best Regards.

2

Hi, hope your issue is sorted. if not let’s discuss more in detail about it. happy to learn from community here and dive deeper and learn together.

Have you checked calco network policies?…ICMP might be blocked by default. review network policies. DNS mistmatch… on bare metal ensure setting andverify IP forwarding And Routing…so those could help