Nortel Networks NB5PLUS4/W - Manual (Page 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 first 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
flow on the low priority queue thus preventing en-queuing high priority traffic. To
prevent such conditions the en-queuing process is using a simple configurable al-
location of per-queue lengths, adding up to the total queue length.
Configuration:
The Expedited Forwarding queue (fast service queue) length will be configurable via
the config.xml file. This parameter will not be configurable via the Web UI. Please
call NetComm Support and request to speak with an engineer should you require
this XML file to edit.