Cisco Catalyst 2960 Series User Manual

Table 63: Default DSCP Input Queue Threshold Map
Queue ID–Threshold ID
DSCP Value
1–10–39
2–140–47
1–148–63
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
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.
Note
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
Queue 4Queue 3Queue 2Queue 1Feature
25 percent25 percent25 percent25 percentBuffer allocation
100 percent100 percent200 percent100 percentWTD drop threshold 1
100 percent100 percent200 percent100 percentWTD drop threshold 2
50 percent50 percent50 percent50 percentReserved threshold
400 percent400 percent400 percent400 percentMaximum threshold
00025SRR shaped weights
(absolute)
25252525SRR shared weights
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
565
Information About QoS

Cisco Catalyst 2960 Series Specifications

General

Layer	Layer 2
Power over Ethernet (PoE)	Available on some models
RAM	128 MB
Flash Memory	32 MB
MAC Address Table Size	8000
Operating Temperature	0°C to 45°C (32 to 113°F)
Ports	24 or 48 x 10/100/1000