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I have a small cluster running centos 7 composed of machines A, B and C. They are all separate physical machines connected on the same LAN.
Machine A can ping B and C. Machine B can ping A and C. However, machine C can only ping machine A.
My problem is that machine C cannot ping machine B. It says Destination Host Unreachable.
I have tried changing the network switch, changing the Ethernet, disabling firewalls and SELinux on all the machines and still the problem persists. I have also checked the IP address and the /etc/hosts file to ensure they are all consistent.
I'm wondering what I could try to help diagnose the cause of this problem.
Thank you !
1This could be a subnet mask issue. Can you add the interface config to the question? – Paul – 2016-08-09T03:58:41.113