User's Manual

Technical Notes – QoS Features on BES50

Step (3) Define a QoS policy for the selected traffic stream

A QoS policy determines the course of action applying to incoming IP packets that belong to the same traffic

stream. The action can be mark/re-mark IP DSCP or mark/re-mark the CoS priority of the incoming Ethernet

frames. BES50FE will provide QoS treatment based on the new IP DSCP or CoS value:

• CoS: The new CoS value maps into one of the traffic class based on the CoS to traffic class

mapping (see Figure 1: BES50FE Priority to Traffic Class).

NOTE:

Using a QoS policy to set the new CoS value will not modify the DSCP of the affected

IP packet. Only the 802.1p value of the egress Ethernet frame (that encapsulated the

affected IP packet) will be modified.