3Com Switch 8800 Configuration Guide Chapter 33 QoS Configuration
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33.4.5 Queue Scheduling Configuration Example I. Network requirements
Modify the correspondence between 802.1p priority levels and local priority levels to
change the mapping between 802.1p priority levels and queues. That is, put packets
into outbound queues according to the new mapping. Use WRR algorithm for the
queues 0 to 5 at the port GE7/1/1. Set the queues 0, 1 and 2 into WRR queue 1, with
weight respectively as 20, 20 and 30; set the queues 3, 4 and 5 into WRR queue 2, with
weight respectively as 20, 20 and 40. The queues 6 and 7 use SP algorithm. See
Queue Scheduling for the default mapping.
Table 33-19 802.1p priority —> Local precedence mapping table
802.1p priority Local precedence
0 7
1 6
2 5
3 4
4 3
5 2
6 1
7 0
II. Network diagram
GE7/1/8
GE7/1/1 GE7/1/2
VLAN2,
1.0.0.1/8 VLAN3,
2.0.0.1/8
PC1 PC2
GE7/1/8
GE7/1/1 GE7/1/2
VLAN2,
1.0.0.1/8 VLAN3,
2.0.0.1/8
PC1 PC2
Figure 33-10 Network diagram for queue-schedule configuration
III. Configuration procedure
1) Re-specify the mapping between 802.1p priority and local precedence.
[SW8800] qos cos-local-precedence-map 7 6 5 4 3 2 1 0