37-26
Catalyst 3750-E and 3560-E Switch Software Configuration Guide
OL-9775-08
Chapter 37 Configuring QoS
Configuring Auto-QoS
• A switch is enabled with QoS, these guidelines take effect:
–
If you configure the interface for conditional trust on a voice device, only the legacy auto-QoS
VoIP configuration is generated.
–
If you configure the interface for conditional trust on a video device, the enhanced auto-QoS
configuration is generated.
–
If you configure the interface with classification or conditional trust based on the new interface
auto-QoS commands, enhanced auto-QoS configuration is generated.
• Auto-QoS migration happens after a new device is connected when the auto qos srnd4 global
configuration command is enabled.
Note If an interface previously configured with legacy auto-QoS migrates to enhanced auto-QoS, voice
commands and configuration are updated to match the new global QoS commands.
Auto-QoS configuration migration from enhanced auto-QoS to legacy auto-QoS can occur only when
you disable all existing auto-QoS configurations from the interface.
Global Auto-QoS Configuration
Ta b l e 37-5 Generated Auto-QoS Configuration
Description Automatically Generated Command {voip}
Enhanced Automatically Generated
Co
mmand{Video|Trust|Classify}
The switch automatically enables
st
andard 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 2
6 32 46 48 56
Switch(config)# mls qos
Switch(config)# mls qos
map cos-dscp 0
8 16 24 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 co
s-map queue 1 threshold 2 1
Switch(config)# mls qos srr-queue
input co
s-map queue 1 threshold 3 0
Switch(config)# mls qos srr-queue
input co
s-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 co
s-map queue 2 threshold 3 3 5
Switch(config)# no mls qos srr-queue
input cos-m
ap
Switch(config)# mls qos srr-queue
input cos-m
ap queue 1 threshold 2 3
Switch(config)# mls qos srr-queue
input cos-m
ap queue 1 threshold 3 6 7
Switch(config)# mls qos srr-queue
input cos-m
ap queue 2 threshold 1 4
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