R2511-HP MSR Router Series ACL and QoS Configuration Guide(V5)

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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:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter FR class view.
fr class class-name N/A
3. Enable FR congestion
management for FR PVCs.
congestion-threshold { de | ecn }
queue-percentage
By default, FR congestion
management is disabled for
FR PVCs.
Configuring FR DE rule list
Ste
p
Command Remarks
1. Enter system view.
system-view N/A