Arris NVG599, Administrator'S Handbook

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Administrator’s Handbook
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the router will have to buffer enough (about a full second worth of traffic) so that the burst of traffic doesn't
get tail-dropped when it arrives and is enqueued at the same time in the same burst.
On the other hand, it is undesirable to buffer too much data in the queue(s) since the packets may be stale by
the time they are sent. It may be desirable to drop the traffic sufficiently that there are queuing disciplines
such as Random Early Discard (RED) that do not drop packets from the tail of the queue. Instead, RED drops
packets towards the front of the queue, so that the congestion is noticed more quickly in order for the sender
to scale back bandwidth usage to avoid drops.
The following types of queue “building blocks” are supported:
‹
basic queue
‹
ingress queue
‹
priority queue
‹
wfq (weighted fair queue)
Basic queues have three different packet dropping options:
‹
byte|packet fifo ( bpfifo )
‹
random early discard ( red )
‹
stochastic fairness queuing ( sfq )
set queue name queue_name type [ basic | ingress | priority | wfq ]
Sets the type of queue.
set queue name queue_name options [ off | red | sfq ]
Sets the queue packet dropping options.
set queue name queue_name size [ 1... 64 ]
Sets the maximum number of packets that can be enqueued.
set queue name queue_name bytes [ 2048... 131072 ]
Sets the maximum total number of bytes that can be enqueued.
set queue name queue_name perturb [ 0... 100 ]
Sets the interval in seconds for queue algorithm perturbation when queue option is sfq .
set queue name queue_name police-rate [ 0... 100000000 ]
Sets the rate in milliseconds that is used for policing traffic when the queue type is ingress .
set queue name queue_name police-burst [ 0... 100000000 ]
Sets the burst rate in milliseconds that is used for policing traffic when the queue type is ingress .
set queue name queue_name bw-sharing [ on | off ]
Enables or disables bandwidth sharing, when the queue type is either priority or wfq .