Configuring The Minimum-Reserve Levels - Cisco WS-C3550-12G Software Configuration Manual

Chapter 20 Configuring QoS

Configuring the Minimum-Reserve Levels

You can configure the buffer size of the minimum-reserve levels on all 10/100 ports and assign the
minimum-reserve level to an egress queue on a 10/100 Ethernet port.
Beginning in privileged EXEC mode, follow these steps to configure the egress queue sizes:
Command
Step 1
configure terminal
Step 2 mls qos
Step 3
mls qos min-reserve min-reserve-level
min-reserve-buffersize
Step 4
interface interface-id
Step 5
wrr-queue min-reserve queue-id
min-reserve-level
Step 6 end
Step 7
show mls qos interface buffers
Step 8 copy running-config startup-config
To return to the default minimum-reserve buffer size, use the no mls qos min-reserve min-reserve-level
global configuration command. To return to the default queue selection of the minimum-reserve level,
use the no wrr-queue min-reserve queue-id interface configuration command.
This example shows how to configure minimum-reserve level 5 to 20 packets and to assign
minimum-reserve level 5 to egress queue 1 on the Fast Ethernet 0/1 interface 0/1:
Switch(config)# mls qos min-reserve 5 20
Switch(config)# interface fastethernet0/1
Switch(config-if)# wrr-queue min-reserve 1 5
78-11194-03
Purpose
Enter global configuration mode.
Enable QoS on the switch.
Configure the buffer size of the minimum-reserve level, if necessary,
for all the 10/100 Ethernet ports.
By default, the buffer size for all eight minimum-reserve levels is set
to 100 packets.
• For min-reserve-level, specify the minimum-reserve level number.
The range is 1 to 8.
• For min-reserve-buffersize, specify the buffer size. The range is 10
to 170 packets.
Enter interface configuration mode, and specify the egress 10/100
Ethernet interface.
Assign a minimum-reserve level number to a particular egress queue.
By default, queue 1 selects minimum-reserve level 1, queue 2 selects
minimum-reserve level 2, queue 3 selects minimum-reserve level 3,
and queue 4 selects minimum-reserve level 4.
• For queue-id, specify the ID of the egress queue. The range is 1
to 4, where 4 can be configured as the expedite queue. For more
information, see the "Configuring the Egress Expedite Queue"
section on page 20-54.
For min-reserve-level, specify the minimum-reserve level
•
configured in Step 3.
Return to privileged EXEC mode.
Verify your entries.
(Optional) Save your entries in the configuration file.
Catalyst 3550 Multilayer Switch Software Configuration Guide
Configuring QoS
20-53