PLANET XGS3-24040 - Manual (Page 163)

Chapter 17 Qos Configuration
17-12
QoS configuration in Switch2:
Switch#config
Switch(config)#mls qos
Switch(config)#interface ethernet 1/1
Switch(Config-If-Ethernet1/1)#mls qos trust ip-precedence pass-through-qos
17.4 QoS Troubleshooting
 QoS is disabled on switch ports by default, 8 sending queues are set by default, queue1 forwards
normal packets, other queues are used for some important control packets (such as BPDU).
 When QoS is enabled in Global Mode, QoS is enabled on all ports with 8 traffic queues. The default
CoS value of the port is 0; the port is in not Trusted state by default; the default queue weight values are
1, 2, 3, 4, 5, 6, 7, 8. in order, all QoS Map is using the default value.
 CoS value 7 maps to queue 8 that has the highest priority and usually reserved for certain protocol
packets. It is not recommended for the user to change the mapping between CoS 7 to Queue 8, or set
the default port CoS value to 7.
 Policy map can only be bound to ingress direction, egress is not supported yet.