Dell POWEREDGE M1000E User Manual

Page 808

36-22

Cisco Catalyst Blade Switch 3130 and 3032 for Dell Software Configuration Guide

OL-13270-03

Chapter 36 Configuring QoS

Configuring Auto-QoS

If the packet does not have a DSCP value of 24, 26, or 46 or is out of profile, the switch changes the
DSCP value to 0. The switch configures ingress and egress queues on the port according to the
settings in

Table 36-3

and

Table 36-4

•

When you enter the auto qos voip trust interface configuration command on a port connected to
the interior of the network, the switch trusts the CoS value for nonrouted ports or the DSCP value
for routed ports in ingress packets (the assumption is that traffic has already been classified by other
edge devices). The switch configures the ingress and egress queues on the port according to the
settings in

Table 36-3

and

Table 36-4

For information about the trusted boundary feature, see the

“Configuring a Trusted Boundary to

Ensure Port Security” section on page 36-38

When you enable auto-QoS by using the auto qos voip cisco-phone, the auto qos voip cisco-softphone,
or the auto qos voip trust interface configuration command, the switch automatically generates a QoS
configuration based on the traffic type and ingress packet label and applies the commands listed in

Table 36-5

to the port.

Table 36-5

Generated Auto-QoS Configuration

Description

Automatically Generated Command

The switch automatically enables standard QoS and configures
the CoS-to-DSCP map (maps CoS values in incoming packets
to a DSCP value).

Switch(config)# mls qos

Switch(config)# mls qos map cos-dscp 0 8 16 26 32 46

48 56

The switch automatically maps CoS values to an ingress queue
and to a threshold ID.

Switch(config)# no mls qos srr-queue input cos-map

Switch(config)# mls qos srr-queue input cos-map

queue 1 threshold 3 0

Switch(config)# mls qos srr-queue input cos-map

queue 1 threshold 2 1

Switch(config)# mls qos srr-queue input cos-map

queue 2 threshold 1 2

Switch(config)# mls qos srr-queue input cos-map

queue 2 threshold 2 4 6 7

Switch(config)# mls qos srr-queue input cos-map

queue 2 threshold 3 3 5

The switch automatically maps CoS values to an egress queue
and to a threshold ID.

Switch(config)# no mls qos srr-queue output cos-map