H3C S7500 Series Ethernet Switches Command Manual

Command Manual – QoS
H3C S7500 Series Ethernet Switches Chapter 1
QoS Commands
1-13
Parameters
dscp: Puts a packet into the corresponding output queue on a port according to the
DSCP precedence of the packet.
ip-precedence: Puts a packet into the corresponding output queue on a port according
to the IP precedence of the packet.
cos: Puts a packet into the corresponding output queue on a port according to the CoS
precedence of the packet.
local-precedence: Puts a packet into the corresponding output queue on a port
according to the local precedence of the packet.
Description
Use the priority trust command to specify the priority type according to which the
switch puts a packet into the output queue on a port.
By default, the switch puts a packet into the output queue on a port according to the
local precedence of the packet.
A port supports eight output queues with different precedence levels. The packets in an
output queue with a higher precedence will be delivered preferentially. The switch puts
a packet into an output queue on a port according to the precedence of the packet.
z DSCP precedence ranges from 0 to 63. The packets with precedence value from 0
to 7 are put into queue 0, and those with precedence value from 8 to 15 are put
into queue 1, and so on.
z IP precedence ranges from 0 to 7, the packets with precedence value 0 are put
into queue 0, and those with precedence value 1 are put into queue 1, and so on.
z CoS precedence ranges from 0 to 7, the packets with precedence value 0 are put
into queue 2, the packets with precedence value 1 are put into queue 0, and the
packets with precedence value 2 are put into queue 1. As for the left precedence
values, the queue number is equal to the precedence value. For example, the
packets whose precedence value is 3 are put into queue 3.
z Local precedence ranges from 0 to 7. The packets with precedence value 0 are
put into queue 0, and so on.