Introduction To Priority Mapping Tables - HP 1920 Gigabit Ethernet Switch Series User Manual

For more information about 802.1p priority and DSCP values, see
•
• Local precedence is a locally significant precedence that the device assigns to a packet. A local
precedence value corresponds to an output queue. Packets with the highest local precedence are
processed preferentially.
The device provides the following priority trust modes on a port:
Trust packet priority—The device assigns to the packet the priority parameters corresponding to the
•
packet's priority from the mapping table.
Trust port priority—The device assigns a priority to a packet by mapping the priority of the
•
receiving port.
You can select one priority trust mode as needed.
a device.
Figure 462 Priority mapping process

Introduction to priority mapping tables

The device provides the following types of priority mapping tables:
• CoS to Queue—802.1p--to-local mapping table.
DSCP to Queue—DSCP-to-local mapping table, which applies to only IP packets.
•
Table 148 through
Table 148 Default CoS to Queue mapping table
Input CoS value
0
1
2
3
4
5
6
7
Table 149 list the default priority mapping tables.
Figure 462 shows the process of priority mapping on
Local precedence (Queue)
2
0
1
3
4
5
6
7
475
"Packet precedences."