Users Guide

Class-of-Service 1563
CoS Queue Usage
CoS queue 7 is reserved by the system and is not assignable. It is generally
recommended that the administrator utilize CoS queues 0 to 3, as CoS
queues 4-6 may be used by the system for other types of system traffic, for
example, routing protocol PDU handling.
Default CoS Values
Table 44-1 shows the global default values for CoS.
Table 44-1. CoS Global Defaults
Parameter Default Value
Trust Mode 802.1p User Priority
802.1p CoS value to queue mapping 802.1p User Priority Queue
0, 3 1
1, 2 0
4, 5 2
6, 7 3
IP DSCP value to queue mapping IP DSCP Queue
0–7, 24–31 1
8–23 0
32–47 2
48–63 3
Interface Shaping Rate 0 Kbps
Minimum Bandwidth 0%
Scheduler Type Weighted
Queue Management Type Taildrop
Drop Precedence Level 1
WRED Decay Exponent 9
WRED Minimum Threshold 40
WRED Green Minimum Threshold 40