Setting The Priority According To Which A Packet Is Put Into An Output Queue - H3C S7500 Series Operation Manual

Operation Manual – QoS
H3C S7500 Series Ethernet Switches
Note:
For LPUs that are not of A-type, if you specify the trusted priority for adding packets to
output queues by using the priority-trust dscp or priority-trust ip-precedence
command, the switch will convert the DSCP precedence or IP precedence of the
received packets to the corresponding CoS precedence according to the DSCP-CoS
precedence mapping table or IP-CoS precedence mapping table and then add the
packets to the corresponding queues by CoS priority. In this case, the precedence is
converted as follows.
DSCP precedence 0 through 7 are mapped to CoS precedence 2; 8 through 15 to
CoS precedence 0; 16 through 23 to CoS precedence 1; 24 through 31 to CoS
precedence 3; 32 through 39 to CoS precedence 4; 40 through 47 to CoS
precedence 5, 48 through 55 to CoS precedence 6; 56 through 63 to CoS
precedence 7.
IP precedence 0 is mapped to CoS precedence 2; IP precedence 1 to CoS
precedence 0; IP precedence 2 to CoS precedence 1; IP precedence 3 to CoS
precedence 3. The others are as those listed in
1.4.1 Setting the Priority According to Which a Packet is Put into an Output
Queue
You can select a type of priority as the basis for a packet to be put into an output queue
on a port as required.
I. Configuration prerequisites
The priority according to which a packet is put into an output queue is specified.
II. Configuration procedure
Follow these steps to set the priority according to which a packet is put into an output
queue:
To do...
Enter system view
Configure the priority
according to which a
packet is put into an
output queue
Use the command...
system-view
priority-trust { dscp |
ip-precedence | cos |
local-precedence }
1-15
Chapter 1 QoS Configuration
Table 1-7.
Remarks
—
Required
By default, a queue is put
into an output queue on a
port according to the local
precedence of the packet.