Network support:
Configuring traffic shaping
You can configure traffic shaping on many vendor platforms. Use the examples below to learn how configure traffic shaping on devices for several vendors. We recommend configuring a committed burst size equal to a 4ms Tc and an excess burst size equal to 0 bits (when applicable).
Examples:
CIR: 50Mbps
Burst size = 50,000,000bps × .004 seconds = 200,000 bits
CIR: 20Mbps
Burst size = 20,000,000bps × .004 seconds = 80,000 bits
The commands below configure the following settings and apply traffic shaping to interface FastEthernet0/1. In this example the Bc is 200,000 bits. This is because 50,000,000 bps × .004 seconds = 200,000 bits. You may need to adjust your queue-limit depending on your traffic load.
CIR = 50,000,000 bits/sec
Bc = 200,000 bits
Be = 0 bits
Queue-Limit = 400 packets
CPE-ROUTER#config t
Enter configuration commands, one per line. End with CNTL/Z.
CPE-ROUTER (config)#policy-map SHAPE
CPE-ROUTER (config-pmap)#class class-default
CPE-ROUTER (config-pmap-c)#shape average 50000000 200000 0
CPE-ROUTER (config-pmap-c)#queue-limit 400
CPE-ROUTER (config-pmap-c)#interface FastEthernet0/1
CPE-ROUTER (config-if)#service-policy output SHAPE
The commands below configure the following settings and apply traffic shaping to interface FastEthernet0/1. Additionally the child policy XYZ-QOS is nested under the parent policy SHAPE. The parent policy (SHAPE) provides the traffic shaping for all traffic, the child policy (XYZ-QOS) provides the QoS functions per queue (scheduling, prioritization, etc).
CIR = 50,000,000 bits/sec
Bc = 200,000 bits
Be = 0 bits
Queue-Limit = 400 packets
CPE-ROUTER#config t
Enter configuration commands, one per line. End with CNTL/Z.
CPE-ROUTER (config)#policy-map SHAPE
CPE-ROUTER (config-pmap)#class class-default
CPE-ROUTER (config-pmap-c)#shape average 50000000 200000 0
CPE-ROUTER (config-pmap-c)#queue-limit 400
CPE-ROUTER (config-pmap-c)#service-policy XYZ-QOS
CPE-ROUTER (config-pmap-c)#interface FastEthernet0/1
CPE-ROUTER (config-if)#service-policy output SHAPE
The commands below will configure traffic shaping on interface ge-0/0/0 with a CIR of 50 Mbits/sec
CPE-ROUTER> configure private
warning: uncommitted changes will be discarded on exit
Entering configuration mode
[edit]
CPE-ROUTER # set class-of-service interfaces ge-0/0/0 unit 0 shaping-rate 50m
[edit]
CPE-ROUTER # commit and-quit
Use the information below to configure SonicWall:
