Symptom

Pings from control-plane/SVI on N9K will not complete for packet-size >1992. N9K# ping 1.1.1.1 df-bit packet-size 1992 PING 1.1.1.1 (1.1.1.1): 1992 data bytes 2000 bytes from 1.1.1.1: icmp_seq=0 ttl=254 time=0.808 ms 2000 bytes from 1.1.1.1: icmp_seq=1 ttl=254 time=0.55 ms 2000 bytes from 1.1.1.1: icmp_seq=2 ttl=254 time=0.531 ms 2000 bytes from 1.1.1.1: icmp_seq=3 ttl=254 time=0.524 ms 2000 bytes from 1.1.1.1: icmp_seq=4 ttl=254 time=0.521 ms --- 1.1.1.1 ping statistics --- 5 packets transmitted, 5 packets received, 0.00% packet loss round-trip min/avg/max = 0.521/0.586/0.808 ms N9K# ping 1.1.1.1 df-bit packet-size 1993 PING 1.1.1.1 (1.1.1.1): 1993 data bytes Request 0 timed out Request 1 timed out Request 2 timed out Request 3 timed out Request 4 timed out

Conditions

N9K connected to FEX

Workaround

None. Pings through the N9K work correctly. Only pings FROM the N9K are affected.

Further Problem Description