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

114
Ste
p
Command Remarks
Configure the lower limit,
upper limit, and drop
probability denominator for
each IP precedence value in
WRED.
wred ip-precedence
precedence low-limit
low-limit high-limit
high-limit
[ discard-probability
discard-prob ]
Optional.
14. Return to system view.
quit
N/A
15. Create a policy and enter policy view.
qos policy policy-name N/A
16. Associate the class with the traffic behavior in the
QoS policy.
classifier classifier-name
behavior behavior-name
N/A
17. Return to system view.
quit N/A
18. Enter FR class view.
fr class class-name N/A
19. Apply the QoS policy in the outbound direction
of the FR class and configure CBQ on the FR PVC.
apply policy policy-name
outbound
N/A
For more information about PQ, CQ, WFQ, CBQ, and RTPQ configuration, see "Configuring
congestion management."
Configuring FR interface queuing
Universal queuing mechanisms (including FIFO, PQ, CQ, WFQ, CBQ, and RTPQ) are available on FR
interfaces.
PVC PQ is specific to FR interfaces and is available only on FR interfaces. With FRTS or FR congestion
management enabled, an FR interface supports only FIFO or PVC PQ.
PVC PQ contains four queues, including top queue, middle queue, normal queue, and bottom queue, in
descending priority order. Packets in the four queues are sent in the descending priority order. The
packets in the top queue are sent first, then the packets in the middle queue followed by the packets in
the normal queue, and finally the packets in the bottom queue. Each PVC on an interface corresponds to
a PVC PQ priority queue, and all the packets from the PVC are assigned to the PVC PQ priority queue.
To configure PVC PQ:
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. Configure PVC PQ for the FR
interface and set the length of
each PVC PQ priority queue.
fr pvc-pq [ top-limit middle-limit
normal-limit bottom-limit ]
N/A
4. Return to system view.
quit N/A
5. Enter FR class view.
fr class class-name N/A
6. Specify the PVC PQ priority
queue for the FR PVC.
pvc-pq { bottom | middle | normal
| top }
Optional.
By default, packets from an FR PVC
are assigned to the normal queue.