Queue Length As A Delay Value - Alcatel-Lucent 7450 Quality Of Service Manual

Ethernet service switch; service router; extensible routing system

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Without any traffic in the other queues constraining the operational PIR on this queue, the

MBS used is the administrative MBS.

*B:PE# show pools access-egress 5/1/1 queue-group "qg1" instance 1

===============================================================================

Queue : accQGrp->qg1:1(5/1/1)->1

===============================================================================

Hi Prio Only

If traffic is sent to the other queues in the queue group such that the operational PIR of queue

1 is reduced to 25 Mbps, the show output changes to:

*B:PE# show pools 5/1/1 access-egress queue-group "qg1" instance 1

===============================================================================

Queue : accQGrp->qg1:1(5/1/1)->1

===============================================================================

Hi Prio Only

The output shows that the operational MBS is now 50% of the administrative MBS and that

the queue's high-prio-only and hi-low-prio-only values have changed accordingly.

Queue Length as a Delay Value

The length of a queue within an egress queue group template can be configured as a target

queue delay, in milliseconds, rather than an absolute byte/kbytes value. The queue MBS is

calculated from the queue delay and the administrative PIR with the MBS [kB] is

approximately the value of ((queue delay[ms]/1000) × (PIR[kbps] / 8)).

The queue delay is configured as follows:

Quality of Service Guide

mbs 1000 kilobytes

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Service Egress and Ingress QoS Policies

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Hi Low Prio Only : 216 KB

Hi Low Prio Only : 108 KB