We have one port channel configured in our Customer environment. This port channel has been configured with 6x4Gbps ports inside it. One of the switch port started flapping (up & down) continuously, which caused multiple alerts on many hosts as well as drastic performance slowness on one of the Business Critical application. It caused a major issue and later on after disabling this port administratively, the issue got resolved.
Could you let me know the cause of major impact and port-channel behavior in such rare cases, where because of one port flapping, whole port channel got affacted ? Is it a expected behavor of port-channel of kind of software bug in Cisco MDS 9513 switches running SAN OS ?
Thanks for the response.
The switch is running with OS version 4.2(7e) and the port-channel configuration is provided below:
port-channel 31 is trunking
Admin port mode is E, trunk mode is on
snmp link state traps are enabled
Port mode is TE
Port vsan is 1
Speed is 24 Gbps
Trunk vsans (admin allowed and active) (1,5,431,435)
Trunk vsans (up) (1,5,431,435)
Trunk vsans (isolated) ()
Member : fc1/2
Member : fc1/3
Member : fc1/4
Member : fc1/5
Member : fc1/6
Please let me know in case any further details required.