Set Trust Mode - Yamaha L2 Command Reference Manual

228 | Command Reference | Traffic control
SWR2311P(config-if)#qos cos 2
Return the default CoS value to the default value.
SWR2311P(config-if)#no qos cos

9.2.3 Set trust mode

[Syntax]
qos trust mode
no qos trust
[Parameter]
mode
[Initial value]
qos trust cos
[Input mode]
interface mode
[Description]
Specifies the trust mode of the LAN/SFP port.
If this is executed with the "no" syntax, the default value (CoS trust mode) is specified.
In the case of "CoS" trust mode, the CoS value of incoming frames is used to determine the egress queue. In the case of
"DSCP," the DSCP value of incoming frames is used to determine the egress queue. In the case of "port priority," the priority
specified for the receiving port is used to determine the egress queue.
The CoS value and DSCP value, and the egress queue that is associated with the receiving port, can be changed by using the
following commands.
Trust mode
CoS
DSCP
Port Priority
Within the various QoS processes, there are four types of timing that determine (change) the egress queue.
1. When assigning the egress queue
2. Specifying the egress queue by class map
3. Specifying pre-marking by class map
4. Specifying remarking by class map
Types 2, 3, and 4 can be specified whether the trust mode is "CoS" or "DSCP"; in either case, the egress queue is assigned by
referencing the "egress queue ID conversion table" that corresponds to its own trust mode.
[Note]
In order to execute this command, QoS must be enabled.
If a policy map is applied to the LAN/SFP port, the trust mode cannot be changed.
Some QoS functions have limitations on execution depending on the trust mode, or may show different results.
[Example]
Set the trust mode of the LAN/SFP port to DSCP.
: Trust mode
Setting value
cos
dscp
port-priority
Setting value used for egress queue
determination
CoS - egress queue ID conversion table
DSCP - egress queue ID conversion
table
Priority specified for each receiving port qos port-priority-queue
Description
Determines the egress queue based on the CoS
value
Determines the egress queue based on the DSCP
value
Applies the specified priority to the receiving
port
Corresponding command
qos cos-queue
qos dscp-queue