Cisco Catalyst 3750 - Default Egress Queue-Set Configuration; Default Mapping Table Configuration

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Catalyst 3750 Metro Switch Software Configuration Guide
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Chapter 26 Configuring QoS
Configuring Standard QoS
Default Egress Queue-Set Configuration
Table 26-9 shows the default egress queue-set configuration when QoS is enabled. All ports are mapped
to queue-set 1. The port bandwidth limit is set to 100 percent, and the rate is unlimited.
Table 26-10 shows the default CoS output queue threshold map when QoS is enabled.
Table 26-11 shows the default DSCP output queue threshold map when QoS is enabled.
Default Mapping Table Configuration
The default CoS-to-DSCP map is shown in Table 26-12 on page 26-59.
The default IP-precedence-to-DSCP map is shown in Table 26-13 on page 26-60.
The default DSCP-to-CoS map is shown in Table 26-14 on page 26-62.
The default DSCP-to-DSCP-mutation map is a null map, which maps an inbound DSCP value to the
same DSCP value.
The default policed-DSCP map is a null map, which maps an inbound DSCP value to the same DSCP
value (no markdown).
Table 26-9 Default Egress Queue-Set 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 50 percent 100 percent 100 percent
WTD drop threshold 2 100 percent 50 percent 100 percent 100 percent
Reserved threshold 50 percent 100 percent 50 percent 50 percent
Maximum threshold 400 percent 400 percent 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
Table 26-10 Default CoS Output Queue Threshold Map
CoS value 0, 1 2, 3 4 5 6, 7
Queue ID - threshold ID 2 - 1 3 - 1 4 - 1 1 -1 4 - 1
Table 26-11 Default DSCP Output Queue Threshold Map
DSCP Value 0–15 16–31 32–39 40–47 48–63
Queue ID - Threshold ID 2 - 1 3 - 1 4 - 1 1 - 1 4 - 1