Users Guide

CoS Trac class ID Color
5 5 G
6 6 G
7 7 G
NOTE: You cannot modify the default CoS trust map.
User–dened 802.1p CoS trust map
You can override the default mapping by creating a dot1p trust map. All the unspecied dot1p entries map to the default trac class ID 0.
Congure user–dened 802.1p CoS trust map
1 Create a dot1p trust map.
OS10(config)# trust dot1p-map example-dot1p-trustmap-name
OS10(config-tmap-dot1p-map)#
2 Dene the set of dot1p values mapped to trac-class, the qos-group ID.
OS10(config-tmap-dot1p-map)# qos-group 3 dot1p 0-4
OS10(config-tmap-dot1p-map)# qos-group 5 dot1p 5-7
3 Verify the map entries.
OS10# show qos maps type trust-map-dot1p example-dot1p-trustmap-name
DOT1P Priority to Traffic-Class Map : example-dot1p-trustmap-name
Traffic-Class DOT1P Priority
-------------------------------
3 0-4
5 5-7
4 Apply the map on a specic interface or on system-qos, global level.
• Interface level
OS10(conf-if-eth1/1/1)# trust-map dot1p example-dot1p-trustmap-name
NOTE
: In the interface level, the no version of the command returns the conguration to the system-qos level.
If there is no conguration available at the system-qos level, the conguration returns to default mapping.
• System-qos level
OS10(config-sys-qos)# trust-map dot1p example-dot1p-trustmap-name
Apply CoS trust map
After you create a trust map, you must apply the trust map at the interface or system-qos level. To apply the trust map on a specic
interface or on system-qos (global) level:
• Interface level
OS10(conf-if-eth1/1/1)# trust-map dot1p example-dot1p-trustmap-name
NOTE
: In the interface level, the no version of the command returns the conguration to system-qos level. If there is no
conguration available at the system-qos level, then the conguration returns to default mapping.
• System-qos level
OS10(config-sys-qos)# trust-map dot1p example-dot1p-trustmap-name
DSCP trust map:
Assign a predened and reserved trust classication in the policy map for the DSCP ow. Weighted random early detection (WRED) uses
the color assigned to a particular trac to determine the drop-probability and threshold.
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Quality of service