Nortel-networks NB5PLUS4/W Manual do Utilizador descarregar pdf (Página 45)

YML754 Rev1 NB5Plus4/W User Guide

www.netcomm.com.au 45

One Expedited Forwarding (EF) Queue: High Priority queue with non-preemptible

service. The EF queue is always scheduled rst prior to the medium and low priority

queues and runs to completion

Two Queues (Medium and Low Priority) with Weighted Round Robin service. Based

on the associated weights, packets on these queues share the remaining link

bandwidth (after the EF service). The low priority queue corresponds to Best Effort

service. Looking forward, the medium priority queue will play the role of Assured

Forwarding Queue.

Configuration:

a.) The Medium, and Low Priority Queue weights will be selectable via the Web UI.

User weights for these two queues are entered as a percentage in increments of

10%. The sum of the 2 weights must be equal to 100 percent.

En-queuing Policy

Inter-queue isolation to make greed work on the Residential Gateway: the transmit

interface buffer (a common pool for all queues) can be monopolized by a greedy

ow on the low priority queue thus preventing en-queuing high priority trafc. To

prevent such conditions the en-queuing process is using a simple congurable al-

location of per-queue lengths, adding up to the total queue length.

Configuration:

The Expedited Forwarding queue (fast service queue) length will be congurable via

the cong.xml le. This parameter will not be congurable via the Web UI. Please

call NetComm Support and request to speak with an engineer should you require

this XML le to edit.

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Nortel-networks NB5PLUS4/W Manual do Utilizador Página 45