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DCS-3950 series Ethernet switch manual

trust DSCP value; port priority <cos> assigns a priority to the physical port, cos is the

priority to be assigned.

Default: No trust.

Command mode: Interface Mode

Example: Configure Ethernet port 0/0/1 to trust CoS value, i.e., classifying the packets

awitch(ccording to CoS value, DSCP value should not be changed.

Sconfig)#interface ethernet 0/0/1

Switch(Config-Ethernet0/0/1)#mls qos trust cos

24.2.2.11 mls qos cos

Command: mls qos cos {<default-cos> }

no mls qos cos

Function: Configure the default CoS value of the port; the ‘no mls qos cos’ command

restores the default setting.

Parameters: < default-cos> is the default CoS value for the port, the valid range is 0 to 7.

Default: The default CoS value is 0.

Command mode: Interface Mode

Usage Guide: none

Example: Set the default CoS value of Ethernet port 1/1 to 5, i.e., packets coming in

through this port will be assigned a default CoS value of 5 if no CoS value present.

Switch(config)#interface ethernet 0/0/1

Switch(Config-Ethernet0/0/1)#mls qos cos 5

24.2.2.12 service-policy

Command: service-policy {input <policy-map-name>|output <policy-map-name>}

no service-policy {input <policy-map-name>|output

<policy-map-name>}

Function: Apply a policy map to the specified port; the ‘no service-policy input

<policy-map-name>‘ command deletes the specified policy map applied to the port.

Parameters: input <policy-map-name> applies the specified policy map to the ingress

of switch port.

Default: No policy map is bound to ports by default.

Command mode: Interface Mode

Usage Guide: Configuring port trust status and applying policy map on the port are two

conflicting operations; the later configuration will override the earlier configuration. Only

one policy map can be applied to each direction of each port. Egress policy map is not

supported yet.

Example: Bind policy p1 to ingress Ethernet port 0/0/1

Switch(config)#interface ethernet 0/0/1

Switch(Config-Ethernet0/0/1)# service-policy input p1

24.2.2.13 mls qos dscp-mutation

Digitalchina Networks DCS-3950 series User Manual

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