Ping fails
-
Trace the packet flow and check whether ARP or ICMP packets are getting dropped.
-
Trace which direction is failing by using interface statistics.
-
Locate the device that is dropping the packets.
-
Look for any error counters incrementing on that device.
-
Check the MAC address table to
determine whether the MAC addresses are learned on the correct port or port-channel:
-
Enter the show ip route command, which will indicate what MAC
address to look for.
-
Enter the show arp vrf command.
-
Enter the show mac-address-table
command to verify that the MAC address table learns new values.
