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Example: Setting 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 1/1
Switch(Config-If-Ethernet1/1)#mls qos cos 5
13.6 mls qos trust
Command: mls qos trust {cos [pass-through-cos] [pass-through-dscp]|dscp
[pass-through-cos] [pass-through-dscp]| ip-precedence [pass-through-cos]
[pass-through-dscp] |port priority <cos> [pass-through-cos] [pass-through-dscp]}
no mls qos trust
Function: Configures port trust; the ―no mls qos trust‖ command disables the current
trust status of the port.
Parameters: cos configures the port to trust CoS value; cos pass-through-dscp
configures the port to trust CoS value but does not change packet DSCP value; dscp
configures the port to trust DSCP value; dscp pass-through-cos configures the port to
trust DSCP value, but does not change packet CoS value; ip-precedence configures the
port to trust IP precedence; ip-precedence pass-through-cos configures the port to trust
IP precedence, but does not change packet CoS value.
port priority <cos> assigns a priority to the physical port, cos is the priority to be
assigned. Priority of all incoming packets through the port will be set to this cos value. This
is irrelevant to the priority of the packet itself, no modification is done to the packets.
Default: No trust.
Command mode: Interface Configuration Mode.
Usage Guide: trust cos mode: can setting the message cos field based cos-dscp-cos,
setting the message dscp value based cos-dscp, dscp-mutation. If the port have
configured dscp-mutation, the pass-through-dscp command can not be used.
trust dscp mode: can setting the message cos field based dscp-cos, setting the
message dscp value based dscp-mutation. If the port have configured dscp-mutation, the
pass-through-dscp command can not be used.
trust ip-precedence mode: can setting the message cos field based
ip-precedence-dscp-cos, setting the message dscp value based ip-precedence-dscp，
dscp-mutation. If the port have configured dscp-mutation, the pass-through-dscp
command can not be used.
trust port mode: can setting the message cos field based cos-dscp-cos, setting the
message dscp value based cos-dscp， dscp-mutation. If the port have configured
dscp-mutation, the pass-through-dscp command can not be used.
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