User's Manual

Technical Notes – QoS Features on BES50
NN70000-004 issue 1.00 Copyright © 2009 Nortel Networks - 13 -
Figure 7: BES50GE Traffic Prioritization Flow Chart Figure 7: BES50GE Traffic Prioritization Flow Chart
The resulting priority/CoS (basically 802.1p bit value) maps into one of the traffic class (4 classes for BES50FE
and 8 classes for BES50GE). These traffic classes are served by a scheduler that can run in either Weighted
Round Robin (WRR) or Strict Priority.
The resulting priority/CoS (basically 802.1p bit value) maps into one of the traffic class (4 classes for BES50FE
and 8 classes for BES50GE). These traffic classes are served by a scheduler that can run in either Weighted
Round Robin (WRR) or Strict Priority.
To review and/or configure the traffic priority to traffic class mapping, navigate to the Applications > Priority >
Traffic Classes panel (see “Figure 1: BES50FE Traffic Classes” and “Figure 2: BES50GE Traffic Classes”).
To review and/or configure the traffic priority to traffic class mapping, navigate to the Applications > Priority >
Traffic Classes panel (see “Figure 1: BES50FE Traffic Classes” and “Figure 2: BES50GE Traffic Classes”).
Match ACL
Mapping?
IP DSCP
Enabled?
Tagged Ethernet
Frame?
Is it an IP
packet?
Get IP
DSCP
Get
Priority
Index
Get default
port priority
Set CoS
Process Ingress
Ethernet Frame
Yes
No
No
No
Y
es
Y
es
Y
es
No
Map CoS to
Priority
Index
Get CoS from
802.1p value
Map DSCP to
Priority
Index