3 scheduling scheme, 4 weight parameters, 5 early detect drop profiles – CANOGA PERKINS 9145E NID Software Version 3.1 User Manual

Page 131: Scheduling scheme, Weight parameters, Early detect drop profiles

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9145E NID Software User’s Manual

CoS Configuration

Queue Configuration

116

10.3.3 Scheduling Scheme

The 9145E supports two scheduling modes: Strict Priority (SP) and Weigh Fair Queuing (WFQ).
All queues can be set to service packets using one of the scheduling mode mentioned above to
the exception to the LLQ. The LLQ is always set by default to SP. Type the appropriate number
for the schedule scheme you want to modify; 5 for Queue 3, 11 for Queue 2 or 17 for Queue 1.
Press the Space bar to select Strict Priority or Weighted Fair. Press Enter to confirm setting.

10.3.4 Weight Parameters

NOTE:

Queue 3, Queue 2 and Queue 1 require a Weight parameter range
between 0 and 1000. If you enter an invalid weight parameter, INVALID
INPUT will appear at the bottom of the screen.

If WFQ is set as the scheduling method, a weight need to be assigned to each queue. The queue
is proportional to how much bandwidth that queue will receive. The weight value can be of any
range between 0-1000. Type the appropriate number to change the queue weight; 6 for Queue 3,
12 for Queue 2 or 18 for Queue 1. Type the new setting. Press Enter to confirm setting.

10.3.5 Early Detect Drop Profiles

Early Detect is a congestion avoidance mechanism that allows you to drop packets based on a
specific profile. The drop can be selectively applied to packets with a specific PCP value or a
priority. Doing so allows you to drop packets before a specific queue is full.

Every Queue has two drop profiles associated to it. You can configure a drop profile and
associate it with a specific class of service. You can enable or disable each ED Drop Profile
independently. Type the appropriate number for the schedule scheme you want to modify; 7 or 8
for Queue 3, 13 or 14 for Queue 2, and 19 or 20 for Queue 1. Press the Space bar to select
Enabled or Disabled. Press Enter to confirm setting.

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