Dell S4148U-ON OS10 Enterprise Edition User Guide Release 10.4.0E R2 - Page 551

DSCP values 60-62 63 TC id 7 7 Color Y R User-defined DCSP trust map You can override the default mapping by creating DSCP trust map. All the unspecified DSCP entries are mapped to the default traffic class ID 0. Configure user-defined DSCP trust map 1 Create a DSCP trust map. OS10(config)# trust dscp-map dscp-trust-map OS10(config-tmap-dscp-map)# 2 Define the set of dscp values mapped to traffic-class(qos-group) ID OS10(config-tmap-dscp-map)# qos-group 3 dscp 0-15 OS10(config-tmap-dscp-map)# qos-group 5 dscp 16-30 3 Verify the map entries. OS10# show qos maps type trust-map-dscp dscp-trust-map DSCP Priority to Traffic-Class Map : dscp-trust-map Traffic-Class DSCP Priority 3 0-15 5 16-30 4 Apply the map on a specific interface or on system-qos (global) level. • Interface level OS10(conf-if-eth1/1/1)# trust-map dscp dscp-trust-map • System-qos level OS10(config-sys-qos)# trust-map dscp dscp-trust-map Enable trust You can enable trust on interface level or system level by defining a policy. When you enable trust, the mapping of flows with traffic-class IDs is based on the active trust map on the interface. The order of precedence is: 1 Interface level map 2 System-qos level map 3 Default map Configure trust 1 Create a qos type policy-map. OS10(config)# policy-map trust 2 Refer pre-defined reserved class-map class-trust in the policy-map. OS10(config-pmap-qos)# class class-trust 3 Define trust type to be enabled. OS10(config-pmap-c-qos)# trust dot1p 4 Attach the policy-map to interface or system-qos level to make the trusting effective. Quality of service 551