Default Egress Queue Configuration - Cisco Catalyst 2960 series Configuration Manual

Table 63: Default DSCP Input Queue Threshold Map
DSCP Value
0–39
40–47
48–63
Related Topics
Enabling QoS Globally, on page 571
Standard QoS Default Configuration, on page 563

Default Egress Queue Configuration

The following tables describe the default egress queue configurations.
The switch supports 4 egress queues by default, although there is an option to enable a total of 8 egress
Note
queues. Use the mls qos srr-queue output queues 8 global configuration command to enable all 8 egress
queues. Once 8 egress queues are enabled, you are able to configure thresholds and buffers for all 8 queues.
The 8 egress queue configuration is only supported on a standalone switch.
The following table 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. Note
that for the SRR shaped weights (absolute) feature, a shaped weight of zero indicates that the queue is operating
in shared mode. Note that for the SRR shared weights feature, one quarter of the bandwidth is allocated to
each queue.
Table 64: Default Egress Queue Configuration
Feature
Buffer allocation
WTD drop threshold 1
WTD drop threshold 2
Reserved threshold
Maximum threshold
SRR shaped weights
(absolute)
SRR shared weights
Queue 1
25 percent
100 percent
100 percent
50 percent
400 percent
25
25
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
Queue ID–Threshold ID
1–1
2–1
1–1
Queue 2
25 percent
200 percent
200 percent
50 percent
400 percent
0
25
Information About QoS
Queue 3 Queue 4
25 percent 25 percent
100 percent 100 percent
100 percent 100 percent
50 percent 50 percent
400 percent 400 percent
0 0
25 25
565