Reference Guide

Quality of Service 481
The following is an example of the CLI commands:
TCP Congestion Avoidance
Use the TCP Congestion Avoidance page to activate a congestion avoidance
algorithm. The algorithm breaks up or prevents TCP global synchronization
in a congested node, where the congestion is due to various sources sending
packets with the same byte count.
To configure TCP congestion avoidance:
1
Click Quality of Service > General > TCP Congestion Avoidance in the
tree view to display the
TCP Congestion Avoidance page.
NOTE: TCP Congestion Avoidance increases network reliability, but it also
increases network traffic. Continue only if you are sure it will improve overall
network performance. For this change to be effective you must save the
configuration and reboot the device.
2 Check TCP Congestion Avoidance to enable the algorithm.
Configuring TCP Congestion Avoidance Using CLI Commands
The following table summarizes the CLI commands for configuring fields in
the
TCP Congestion Avoidance page.
The following is an example of the CLI commands:
console(config)# interface gi0/5
console(config-if)# traffic-shape 124000 9600
console(config-if)# rate-limit 150000
Table 22-7. TCP Congestion Avoidance CLI Commands
CLI Command Description
qos wrr-queue wrtd
no qos wrr-queue wrtd
Enables Weighted Random Tail Drop (WRTD).
Use the no form of this command to disable
WRTD.
console(config)# qos wrr-queue wrtd
This setting will take effect only after copying
running configuration to startup configuration and
resetting the device.