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User Manual - Configuration Guide (Volume 3)
Versatile Routing Platform
Chapter 3
Congestion Management
3-13
Table QC-3-14 Configuration of queue length of the custom queue
Operation Command
Configure the queue length of the custom
queue
custom-list list-number queue queue-number limit queue-limit
Restore the default value of custom queue
length
no custom-list list-number queue queue-number limit
The queue length of the custom queue is 20 by default, with the value range of 0-32767
packets.
5) Configure the continuously sent byte number of the custom queue (optional),
The continuously sent byte number can be specified for each custom queue (the
number of bytes that can be accommodated).
Perform the following task in the global configuration mode.
Table QC-3-15 Configure the continuously sent byte number of the custom queue
Operation Command
Configure the continuously sent byte number of
the custom queue
custom-list list-number queue queue-number byte-count
byte-count-number
Restore the default value of the continuously
sent byte number of the custom queue
no custom-list list-number queue queue-number byte-count
By default the continuously sent byte number of each queue is 1500 in each polling and
the value range is 0-16777215 bytes.
byte-count-number
:
when the router dispatches the user queue of CQ, it keeps taking
out packets from this queue to send till the sent byte count is no less than the value of
byte-count-number
configured for this queue or until this queue is empty, then it turns to
dispatch the next user queue of CQ. Therefore, the value of byte-count-number will
affect the proportion of interface bandwidth occupied by each user queue of CQ, and
determine the duration after which the router will dispatch the next queue of CQ.
If the value of
byte-count-number
is too small, since the router will turn to the next
queue only after it has at least sent one packet, the bandwidth actually obtained by
respective queues may be quite different from what is expected. If the value of byte-
count-number
is too big, long delay may be resulted from switching between the
queues.
III. Applying custom queue to the interface
The configured custom queue can be applied to a specific interface, and each interface
can only be allocated with one custom queue.
Perform the following task in the interface configuration mode.
Table QC-3-16 Apply the custom queue to the interface
Operation Command
Apply the custom queue to the interface custom-group list-number
Restore the default congestion management policy at the interface no custom-group