Cisco Systems OL-8550-09 Default Egress Queue Configuration

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Catalyst 3750 SwitchSoftware Configuration Guide
OL-8550-09
Chapter35 Configuring QoS
Configuring Standard QoS
Table35-7 shows the default CoS input queue threshold map when QoS is enabled.
Table35-8 shows the default DSCP input queue threshold map when QoS is enabled.
Default Egress Queue Configuration
Table35-9 shows 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.
WTD drop threshold 1 100 percent 100 percent
WTD drop threshold 2 100 percent 100 percent
1. The bandwidth is equally shared between the queues. SRR sends packets in shared mode only.
2. Queue 2 is the priority queue. SRR services the priority queue for its configured share before servicing the other queue.
Table35-6 Default Ingress Queue Configuration (continued)
Feature Queue 1 Queue 2
Table35-7 Default CoS Input Queue Threshold Map
CoS Value Queue ID–Threshold ID
0–4 1–1
52–1
6, 7 1–1
Table35-8 Default DSCP Input Queue Threshold Map
DSCP Value Queue ID–Threshold ID
0–39 1–1
40–47 2–1
48–63 1–1
Table35-9 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 pe rcent 400 percent 400 percent
SRR shaped weights
(absolute) 1
1. A shaped weight of zero means that this queue is operating in shared mode.
25 0 0 0
SRR shared weights 2
2. One quarter of the bandwidth is allocated to each queue.
25 25 25 25