Port Monitor Portguard - Cisco MDS 9000 Series Configuration Manual

Port Monitor Portguard

Port level portguard can be used to shut down misbehaving ports based on certain link event types. Event
thresholds are configurable for each event type per port which makes them customizable between host, array,
and tape F ports, or between intra- and inter-data center E ports, for example.
The events listed above might get triggered by certain events on a port, such as:
• Receipt of Not Operational Signal (NOS)
• Too many hardware interrupts
• The cable is disconnected
• The detection of hardware faults
• The connected device is rebooted (F ports only)
• The connected modules are rebooted (E ports only)
Port Monitor Portguard
The Port Monitor Portguard feature allows a port to be automatically error disabled or flapped when a given
event threshold is reached.
Note
Absolute counters do not support portguard action. However, TX Slowport Oper Delay counter supports
Congestion Isolation portguard action.
The following is the list of events that can be used to trigger the Port Monitor portguard actions:
• err-pkt-from-xbar
• err-pkt-to-xbar
• credit-loss-reco
• link-loss
• signal-loss
• sync-loss
• rx-datarate
• invalid-crc
• invalid-words
• link-loss
• tx-credit-not-available
• tx-datarate
• tx-discards
• tx-slowport-oper-delay
• txwait
Cisco MDS 9000 Series Interfaces Configuration Guide, Release 8.x
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Configuring Interfaces