Cisco 2975 - Catalyst LAN Base Switch, Руководство по настройке программного обеспечения

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Catalyst 2975 Switch Software Configuration Guide
OL-19720-02
Chapter 33 Configuring QoS
Configuring Standard QoS
Default Ingress Queue Configuration
Table 33-6 shows the default ingress queue configuration when QoS is enabled.
Table 33-7 shows the default CoS input queue threshold map when QoS is enabled.
Table 33-8 shows the default DSCP input queue threshold map when QoS is enabled.
Default Egress Queue Configuration
Table 33-9 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.
Table 33-6 Default Ingress Queue Configuration
Feature Queue 1 Queue 2
Buffer allocation 90 percent 10 percent
Bandwidth allocation
1
1. The bandwidth is equally shared between the queues. SRR sends packets in shared mode only.
4 4
Priority queue bandwidth
2
2. Queue 2 is the priority queue. SRR services the priority queue for its configured share before servicing the other queue.
0 10
WTD drop threshold 1 100 percent 100 percent
WTD drop threshold 2 100 percent 100 percent
Table 33-7 Default CoS Input Queue Threshold Map
CoS Value Queue ID–Threshold ID
0–4 1 – 1
5 2
–
1
6, 7 1 – 1
Table 33-8 Default DSCP Input Queue Threshold Map
DSCP Value Queue ID–Threshold ID
0–39 1 – 1
40–47 2 – 1
48–63 1 – 1
Table 33-9 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