I have two k8s cluster with different network environment, their installation configuration is exactly same. k8s's version is 1.14.0, and network addon use calico. One cluster is fine, but the other is not.

The problem is pod's ip can't ping each other across different machine. For example, A pod is in the A machine and it ip is 172.20.0.13, B pod is also in the A machine, ip is 172.20.0.14, and C pod is in the C machine with ip 172.20.1.3. In machine A, pod A and pod B can ping each other, but can't ping pod C.

What should I do.