Configuring The Slow-Port Monitor Timeout Value For Fibre Channel - Cisco MDS 9000 Series Configuration Manual
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Congestion Detection, Avoidance, and Isolation
Table 20: Slow Port Monitor Support on Fibre Channel and FCoE Switching Modules
Function
Txwait OBFL logging
Txwait port monitor counter
Txwait interface counter
Txwait interface unable to transmit
for the last 1 second, 1 minute, 1
hour, and 72 hours
A graphical representation of txwait
for the last 60 seconds, 60 minutes,
and 72 hours
Rxwait OBFL logging
Rxwait interface counter
Rxwait interface unable to receive
for the last 1 second, 1 minute, 1
hour, and 72 hours
A graphical representation of
rxwait for the last 60 seconds, 60
minutes, and 72 hours
Port monitor slow-port counter
OBFL error stats
Interface priority flow control
Configuring the Slow-Port Monitor Timeout Value for Fibre Channel
The slow-port monitor functionality is similar to the no-credit frame timeout and drop functionality, except
that it does not drop frames; it only logs qualifying events. When a Fibre Channel egress port has no transmit
credits continuously for the slow-port monitor timeout period, the event is logged. No frames are dropped
unless the no-credit frame timeout period is reached and no-credit frame timeout drop is enabled. If the
no-credit frame timeout drop is not enabled, no frames are dropped until the congestion frame timeout period
is reached.
Configuring the Slow-Port Monitor Timeout Value for Fibre Channel
Module and Switch Support
16 Gbps and 32 Gbps Fibre
Channel
Yes
Yes
Yes
Yes
Yes
No
No
No
No
Yes
Yes
No
Cisco MDS 9000 Series Interfaces Configuration Guide, Release 8.x
10 Gbps and 40 Gbps FCoE
Yes, from Cisco MDS NX-OS
Release 8.2(1) onwards.
No
Yes, from Cisco MDS NX-OS
Release 8.2(1) onwards.
Yes, from Cisco MDS NX-OS
Release 8.2(1) onwards.
Yes, from Cisco MDS NX-OS
Release 8.2(1) onwards.
Yes
Yes, from Cisco MDS NX-OS
Release 8.2(1) onwards.
Yes, from Cisco MDS NX-OS
Release 8.2(1) onwards.
Yes, from Cisco MDS NX-OS
Release 8.2(1) onwards.
No
Yes, from Cisco MDS NX-OS
Release 8.2(1) onwards.
Yes, from Cisco MDS NX-OS
Release 8.2(1) onwards.
169
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