H3C S7500 Series Ethernet Switches Command Manual

Table Of Contents
Command Manual – QoS
H3C S7500 Series Ethernet Switches Chapter 1
QoS Commands
1-14
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.
z 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.
z 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 values of other IP precedence values are the same as those of
the corresponding CoS precedence.
You can choose the corresponding packet precedence as the basis for putting a packet
into an output queue on a port as required.
Examples
# Configure the switch to put a packet into an output queue according to the DSCP
precedence of the packet.
<H3C> system-view
System View: return to User View with Ctrl+Z.
[H3C] priority-trust dscp
1.1.17 qos
Syntax
qos
View
Ethernet port view
Parameters
None