HP BladeSystem bc2800 Command Line Interface Reference Guide HP BladeSystem PC - Page 242
qos trust (Global
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QoS Commands qos trust (Global) The qos trust Global Configuration mode command configures the system to the basic mode and trust state. To return to default state (trust VPT), use the no form of the command. Syntax qos trust {cos | dscp} no qos trust Parameters n cos - Indicates that ingress packets are classified with packet CoS values. Untagged packets are classified with the default port CoS value. n dscp - Indicates that ingress packets are classified with packet DSCP values. Default Setting CoS is the default trust mode. Command Mode Global Configuration mode Command Usage To disable QoS trust compleletly, use the no qos command. If no qos trust is used, trust VPT is set, and QoS trust is not disabled. Packets entering a Quality of Service (QoS) domain are classified at the edge of the QoS domain. When packets are classified at the edge, the switch port within the QoS domain can be configured to one of the trusted states because there is no need to classify the packets at every device in the domain. A switch port on an inter-QoS domain boundary can be configured to the DSCP trust state, and, if the DSCP values are different between the QoS domains, the DSCP to DSCP mutation map can be applied. Use this command to specify whether the port is trusted and which fields of the packet to use to classify traffic. When the system is configured as trust DSCP, traffic is mapped to a queue according to the DSCP-queue map. The following table describes the VPT Default Mapping Table. VPT Value 0 1 2 3 4 5 Queue Number 2 1 1 2 3 3 18-26 www.hp.com HP PC Blade Switch CLI Reference Guide