Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - QUALITY OF SERVICE CONFIGURATION GUIDE 2010-09-22 Configuration Manual page 53

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very small queues, set the maximum queue length to 256 bytes. The system queues
no more than 256 bytes.
If you do not set the queue lengths, the router varies the queue length dynamically in the
range 1 KB–7 MB.
Create a queue profile and enter Queue Configuration mode.
1.
host1(config)#queue-profile video
host1(config-queue)#
You can configure 16 queue profiles on an E Series router.
(Optional) Set the buffer weight of the queue.
2.
host1(config-queue)#buffer-weight 16
Queues with a buffer weight of 16 are twice as long as queues with a buffer weight of
8. The range is 1–63; the default is 8.
(Optional) Set a minimum or maximum queue length for committed packets.
3.
host1(config-queue)#committed-length 11000 15000
The range of minimum and maximum lengths is 0–1 GB. By default, there is no minimum
or maximum length. The color for committed packets is green.
(Optional) Set a minimum or maximum queue length for conformed packets.
4.
host1(config-queue)#conformed-length 10000 14000
The range of minimum and maximum lengths is 0–1 GB. By default, there is no minimum
or maximum length. The color for conformed packets is yellow.
(Optional) Set a minimum or maximum queue length for exceeded packets.
5.
host1(config-queue)#exceeded-length 9000 10000
The range of minimum and maximum lengths is 0–1 GB. By default, there is no minimum
or maximum length. The color for exceeded packets is red.
(Optional) Set the conformed drop threshold as a percentage of the committed
6.
threshold.
host1(config-queue)#conformed-fraction 60
The range is 0–100 percent; the default is 50.
(Optional) Set the exceeded drop threshold as a percentage of the committed
7.
threshold.
host1(config-queue)#exceeded-fraction 40
The range is 0–100 percent; the default is 25.
Queuing and Buffer Management Overview on page 17
Guidelines for Managing Queue Thresholds on page 19
Guidelines for Managing Buffers on page 20
Memory Requirements for Queue and Buffers on page 19
buffer-weight
committed-length
Chapter 3: Configuring Queue Profiles for Buffer Management
23