User's Manual

Technical Notes – QoS Features on BES50
Match QoS
Policy?
IP DSCP
Enabled?
Tagged Ethernet
Frame?
Action is
“Set DSCP”?
Is it an IP
packet?
Set IP
DSCP
Set CoS
Get CoS
from DSCP
Get default
port priority
Get CoS
from DSCP
Process Ingress
Ethernet Frame
Y
es
Y
es
No
No
No
No (action is “Set CoS”)
Y
es
Y
es
No
Y
es
Get CoS from
802.1p value
Figure 6: BES50FE Traffic Prioritization Flow Chart Figure 6: BES50FE Traffic Prioritization Flow Chart
NN70000-004 issue 1.00 Copyright © 2009 Nortel Networks - 12 -