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Technical Configuration Guide v2.0 NN48500-559
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12.7 Configuration Example 6 - QoS Marking with Port
Role Combination set for Un-restricted using ACL’s
With a port role combination of un-restricted, the DSCP value is passed as-is and is not looked at
by the ERS5500 internal QoS mapping. This does not apply to the p-bit which is looked at,
honoured, and mapped according to the QoS priority mapping table. If you wish to apply QoS to
the DSCP value on an unrestricted port member, either ACL’s or policies must be defined where
you need to map the DSCP value to the appropriate egress queue. For this example, we will
demonstrate how to configure the ERS5500 to support internal QoS mapping for various DSCP
values.
Figure 6: DSCP Mapping via Un-restricted Port Role
For this example, assume we wish to accomplish the following in regarded to the untagged VLAN
5 ingress port members:
• Set a port role of un-restricted with port members 3 to 6
• Select queue set 8 with 8 queues
• For ingress port members 3-5, we wish to map the following DSCP values. Please use
the “show qos queue-set-assignment” command to display the
o For DSCP 0x12 (Silver CoS), map to egress queue 5
o For DSCP 0x1a (Gold CoS), map to egress queue 4
o For DSCP 0x22 (Platinum CoS), map to egress queue 3
To accomplish the above, please follow the configuration steps below.
12.7.1 ERS5500 Configuration
12.7.1.1 Create VLAN 5
ERS5500: Step 1 – Remove port members from default VLAN and create VLAN 5
5500(config)#vlan members remove 1 3-6
5500(config)#vlan create 5 type port
5500(config)# vlan members add 5 3-6
12.7.1.2 Create Queue Set 8
ERS5500: Step 1 – Add queue set 8; please note that you must reboot the switch for the
queue set to take effect
5500(config)#qos agent queue-set 8
5500(config)#boot