Cisco Systems 3750E Default Egress Queue Configuration, Dscp Value Queue ID -Threshold ID, 36-34

Chapter 36 Configuring QoS

Configuring Standard QoS

Default Egress Queue Configuration

Table 36-9shows the default egress queue configuration for each queue-set when QoS is enabled. All ports are mapped to queue-set 1. The port bandwidth limit is set to 100 percent and rate unlimited.

Table 36-9	Default Egress Queue Configuration
Feature		Queue 1	Queue 2	Queue 3	Queue 4
Buffer allocation		25 percent	25 percent	25 percent	25 percent
WTD drop threshold 1		100 percent	200 percent	100 percent	100 percent
WTD drop threshold 2		100 percent	200 percent	100 percent	100 percent
Reserved threshold		50 percent	50 percent	50 percent	50 percent
Maximum threshold		400 percent	400 percent	400 percent	400 percent
SRR shaped weights		25	0	0	0
(absolute) 1
SRR shared weights 2		25	25	25	25

1.A shaped weight of zero means that this queue is operating in shared mode.

2.One quarter of the bandwidth is allocated to each queue.

Table 36-10shows the default CoS output queue threshold map when QoS is enabled.

Table 36-10	Default CoS Output Queue Threshold Map
CoS Value		Queue ID–Threshold ID
0, 1		2–1
2, 3		3–1
4		4–1
5		1–1
6, 7		4–1

Table 36-11shows the default DSCP output queue threshold map when QoS is enabled.

Table 36-11	Default DSCP Output Queue Threshold Map
DSCP Value		Queue ID–Threshold ID
0–15		2–1
16–31		3–1
32–39		4–1
40–47		1–1
48–63		4–1

	Catalyst 3750-E and 3560-E Switch Software Configuration Guide
36-34	OL-9775-02