ATL Telecom R1-SW Ethernet Switch - Manual (Page 204)

R1-SW24L2B User’s Manual
9-36
Specifying Priority for a Transmission Queue
The transmission queue for a packet is selected from eight transmission queues in a port
according to priority of the packet. By default, the packet priority for choosing a transmission
queue is the user-defined priority. However, CoS, IP precedence, DSCP, or VLAN priority can
be used as the packet priority.
The following is a procedure for specifying a value used as the packet priority for choosing a
packet transmission queue:
Table 9-13 Specifying priority for transmission queue
Command Task
qos 1. Enter QoS configuration mode.
queue-precedence
<value1> <value2>
<value3> <value4>
2. Input the values (tos, user, vlan, or class) in the order of high priority.
y <value1> : Specify the highest priority value.
y <value2> : Specify the second-highest priority value. This value is
used when the <vlaue1> can not be used.
y <value3> : Specify the third-highest priority value. This value is used
when the <vlaue1> and <vlaue2> can not be used.
y <value4> : Specify the lowest priority value. This value is used when
the <vlaue1>, <vlaue2>, and <vlaue3> can not be used.
end
3. Return to Privileged mode.
show
queue-precedence
4. Verify the configuration.
The following example shows how to configure the precedence of the values used for
transmission queue priority to the order of VLAN priority Î User’s priority Î Class Î ToS:
(config)# qos
(config-qos)# queue-precedence vlan user class tos
(config-qos)# end
# show queue-precedence
queue precedence odering
vlan user class tos
#