How To Configure A Stuck Frame Timeout Value; Configuring A Stuck Frame Timeout Value; How To Configure A No-Credit Timeut Value; Configuring A No-Credit Timeout Value - Cisco Nexus 5000 Series Configuration Manual

How to Configure a Stuck Frame Timeout Value

How to Configure a Stuck Frame Timeout Value

Configuring a Stuck Frame Timeout Value

The default stuck frame timeout value is 358 ms. The timeout value can be incremented in steps of 10. We
recommend that you retain the default configuration for ISLs and configure a value that does not exceed 500
ms (100 to 200 ms) for fabric F ports.
SUMMARY STEPS
1. switch# configure terminal
2. switch(config)# system timeout congestion-drop seconds mode E | F
3. switch(config)# system timeout congestion-drop default mode E | F
DETAILED STEPS
Command or Action
Step 1 switch# configure terminal
Step 2 switch(config)# system timeout congestion-drop
seconds mode E | F
Step 3
switch(config)# system timeout congestion-drop
default mode E | F
This example shows how to configure a stuck frame timeout value of 100 ms:
switch# configure terminal
switch(config)# system timeout congestion-drop 100 mode F
switch(config)# system timeout congestion-drop default mode F

How to Configure a No-Credit Timeut Value

Configuring a No-Credit Timeout Value

When the port does not have the credits for the configured period, you can enable a no-credit timeout on that
port, which results in all frames that come to that port getting dropped in the egress. This action frees the
buffer space in the ISL link, which helps to reduce the fabric slowdown and congestion on other unrelated
flows that use the same link.
The dropped frames are the frames that have just entered the switch or have stayed in the switch for the
configured timeout value. These drops are preemptive and clear the congestion completely.
Cisco Nexus 5000 Series NX-OS SAN Switching Configuration Guide, Release 5.2(1)N1(1)
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Fibre Channel Slow Drain Device Detection and Congestion Avoidance- An Overview
Purpose
Enters global configuration mode.
Specifies the stuck frame timeout value in milliseconds
and the port mode for the switch.
Specifies the default stuck frame timeout port mode for
the switch.
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