Command Reference Guide
3Com Router 3000 Ethernet Family
Command Reference Guide
Chapter 2 Congestion Management Configuration
Commands
3Com Corporation
2-17
cir committed-information-rate: Committed information rate of traffic. It should not
exceed CBS x 20. Note that in policy embedding, the CIR specified in a child policy
could be less than 8 kbps.
cbs committed-burst-size: Committed burst size, number of bits that can be sent in
each interval, in the range of 15000 to 155000000 bits.
ebs excess-burst-size: Excessive burst size, in the range of 0 to 155000000 bits. It
defaults to 0.
green: Action conducted to packets when traffic of packets conforms to the CIR. By
default, the action of green is pass.
red: Action conducted to packets when traffic of packets does not conform to the CIR.
By default, the action of red is discard.
action: Action conducted on a packet, which is divided into the following types:
z discard: Drops the packet
z remark-dscp-pass new-dscp: Sets new-dscp and transmits the packet.
z remark-prec-pass new-precedence: Sets new-precedence of IP and transmit the
packet.
z remark-mpls-exp-pass new-exp: Sets the new MPLS EXP and transmit the
packet.
z pass: Transmits the packet.
Description
Use the car command to configure traffic monitoring for a behavior.
Use the undo car command to delete the configuration of traffic monitoring.
The policy can be used in the input or outbound direction of the interface.
Application of policy including of TP policy on an interface will cause the previous qos
car command ineffective.
If this command is frequently configured on classes of the same policy, the last
configuration will overwrite the previous ones.
Related command: qos policy, traffic behavior, classifier behavior.
Example
# Use traffic monitor for a behavior. The normal traffic of packets is 38400 bps. Burst
traffic twice of the normal traffic can pass initially and later the traffic is transmitted
normally when the rate does not exceed 38400bps. When the rate exceeds 38400 bps,
the precedence of the packet turns to 0 and the packet is transmitted.
[3Com ] traffic behavior database
[3Com -behavior-database] car cir 38400 cbs 76800 ebs 0 green pass red
remark-precedence-pass 0