R3303-HP HSR6800 Routers ACL and QoS Configuration Guide

133
Ste
p
Command Remarks
5. Enter FR class view.
fr class class-name N/A
6. Set CBS for FR PVCs.
cbs [ inbound ]
committed-burst-size
Optional.
The default setting is 56000 bps.
7. Set EBS for FR PVCs.
ebs [ inbound ] excess-burst-size
Optional.
The default setting is 0 bit.
8. Set CIR ALLOW for FR PVCs.
cir allow [ inbound ]
committed-information-rate
Optional.
The default setting is 56000 bps.
Configuring FR congestion management
FR congestion management includes congestion management on the FR interface and congestion
management on the FR PVC. You can set the congestion thresholds in FR PVC view or FR interface view
for a specific FR class.
Configuring FR congestion management for an FR interface
The device determines whether congestion occurs based on the percentage of the current FR interface
queue length to the total interface queue length. If the percentage exceeds the set congestion threshold,
the device considers congestion has occurred and takes action on packets (for example, drops packets),
to alleviate the condition.
To configure FR congestion management for an FR interface:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter FR interface view.
interface interface-type interface-number N/A
3. Enable FR congestion
management on the FR
interface.
fr congestion-threshold { de | ecn }
queue-percentage
By default, FR congestion
management is disabled
for an FR interface.
Configuring FR congestion management for an FR PVC
The device determines whether congestion has occurred based on the percentage of the current FR PVC
queue length to the total interface queue length. If the percentage exceeds the set congestion threshold,
the device considers that congestion has occurred and takes action on packets (for example, drops
packets), to alleviate the condition.
When you configure FR congestion management for an FR PVC, follow these guidelines:
• With FR congestion management enabled, an FR interface performs only FIFO queuing or PVC PQ.
• With FR congestion management enabled, an FR PVC performs only FIFO queuing.
• To use congestion management on an FR PVC, make sure that FRTS has been enabled on the main
interface of the FR PVC.
To configure FR congestion management for an FR PVC: