D-Link Dis-200G Series Cli Reference Manual page 146

Specify schedule algorithms to WRR, SP for the output queue. By default, the output queue scheduling
algorithm is WRR.
Example
This example shows how to configure the queue scheduling algorithm to the strict priority mode.
Switch# configure terminal
Switch(config)# interface Ethernet 1/0/3
Switch(config-if)# mls qos scheduler sp
Switch(config-if)#
28-4 mls qos trust
This command is used to configure the trust state of a port to trust either the CoS field or the DSCP field of the
arriving packet for subsequent QoS operation. Use the no form of this command to revert to the default setting.
mls qos trust {cos | dscp}
no mls qos trust
Parameters
cos
dscp
Default
By default, CoS is trusted.
Command Mode
Interface Configuration Mode.
Command Default Level
Level: 15.
Usage Guideline
When the interface is set to trust DSCP, the DSCP of the arriving packet will be trusted for the subsequent QoS
operations. First, the DSCP will be mapped to an internal CoS value, which will be subsequently used to
determine the CoS queue. The DSCP to CoS map is configured by the mls qos map dscp-cos command. If
the arriving packet is a non-IP packet, the CoS is trusted. The resulting CoS mapped from DSCP will also be
the CoS in the transmitted packet.
When an interface is in the trust CoS state, the CoS of the arriving packet will be applied to the packet as the
internal CoS and used to determine the CoS queue. The CoS queue is determined based on the CoS to Queue
mapping table.
When a packet arrives at an 802.1Q VLAN tunnel port, the packet will be added with an outer VLAN tag in
order to transmit through the VLAN tunnel. If the port is to trust CoS, then the inner tag CoS will be the internal
CoS of the packet and the CoS value in the packet's outer VLAN tag. If the MLS QoS CoS override is
configured, then the CoS specified by command mls qos cos will be the internal CoS of the packet and the
CoS value in the packet's outer VLAN tag. If the port is to trust DSCP, then the CoS mapped from the DSCP
code point will be the internal CoS of the packet and the CoS value in the packet's outer VLAN tag.
DIS-200G Series Gigabit Ethernet Switch CLI Reference Guide
Specifies that the CoS bits of the arriving packets are trusted for
subsequent QoS operations.
Specifies that the ToS/DSCP bits, if available in the arriving packets
are trusted for subsequent operations. For non-IP packet, Layer 2
CoS information will be trusted for traffic classification.
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