Cisco Catalyst 2960 Series User Manual

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, buffers, bandwidth share
weights, and bandwidth shape weights for all 8 queues. The 8 egress queue configuration is only supported
on a standalone switch.
Note
The egress queue default settings are suitable for most situations. You should change them only when you
have a thorough understanding of the egress queues and if these settings do not meet your QoS solution.
Note
Beginning in privileged EXEC mode, follow these steps to configure the memory allocation and to drop
thresholds for a queue-set. This procedure is optional.
SUMMARY STEPS
1.
configure terminal
2.
mls qos srr-queue output queues 8
3.
mls qos queue-set output qset-id buffers allocation1 ... allocation8
4.
mls qos queue-set output qset-id threshold queue-id drop-threshold1 drop-threshold2 reserved-threshold
maximum-threshold
5.
interface interface-id
6.
queue-set qset-id
7.
end
8.
show mls qos interface [interface-id] buffers
9.
copy running-config startup-config
DETAILED STEPS
PurposeCommand or Action
Enters the global configuration mode.configure terminal
Example:
Switch# configure terminal
Step 1
(Optional) The switch supports 4 egress queues by default, although you can enable
a total of 8 egress queues. Use the optional mls qos srr-queue output queues 8
command to enable the additional 4 egress queues.
mls qos srr-queue output queues 8
Example:
Switch(config)# mls qos
Step 2
Once 8 queue support is enabled, you can then proceed to configure the additional
4 queues. Any existing egress queue configuration commands are then modified
to support the additional queue parameters.
srr-queue output queues 8
The option to enable 8 queues is only available on a standalone switch.Note
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
619
How to Configure 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