Cisco MDS 9000 Series Configuration Manual page 178

Port-Monitor Portguard Action for Congestion Isolation
• ISLs or port channels must be in ER_RDY flow-control mode.
• If you want the port monitor to automatically detect the slow devices, the port-monitor policies must be
Port-Monitor Portguard Action for Congestion Isolation
The cong-isolate port-monitor portguard action automatically isolates a port after a given event rising-threshold
is reached.
Note Absolute counters do not support portguard actions. However, the tx-slowport-oper-delay absolute counter
supports Congestion Isolation portguard action (cong-isolate).
The following is the list of counters that you can use to trigger the Congestion Isolation port-monitor portguard
action (cong-isolate):
• credit-loss-reco
• tx-credit-not-available
• tx-slowport-oper-delay
• txwait
Cisco MDS 9000 Series Interfaces Configuration Guide, Release 8.x
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configured to use the congestion isolation port-guard action (cong-isolate).
Optionally, devices can be configured manually as slow using the congestion-isolation include pwwn
pwwn vsan vsan-id command.
Congestion Detection, Avoidance, and Isolation