CoS Marking Quality of Service (QoS)
CoS Marking
ML700 devices allow flexible COS bits marking in aware-from-HSL direction, using "COS
bits Translation" (applied on HSL Ingress) table. This marking is applicable only for tagged
ETH frame ingressing the TAGGED HSL and egressing the TAGGED ETH-x ports. In other
configuration VLAN tag, even with modified COS bits, will be just stripped (on ingress or
egress) from the original VLAN tag.
The classification results can be propagated to the L2 Priority COS bits of the original frame
either directly in the original Customer TAG or in the external Service Provider Added TAG.
ML700 devices allow flexible COS bits marking towards the HSL using the following
configurable parameters:
RULE MARKING - determines if marking CLASS-TO-COS should be applied, see ML
700 Identification Rules Definition (on page 10-13)
SERVICE QUEUE ID - specifies the CLASS of the Ethernet frame, see ML 700 EVC
Services Definition (on page 10-10)
CLASS to COS bits Mapping table - maps between CLASS assigned to the frame and
COS bit to be written in outer tag.
Marking flow is continued on CO NE, where ML devices allow overwriting COS bits of
external VLAN tag (usually already Service Provider tag), using COS bits translation table,
which is per-bridge configurable. Mapping is applied for Incoming traffic on HSL ingress
ports, before classification, on the systems.
To view and modify COS marking
1. In the Network Element tree, expand Ethernet Bridge and select L2 priority Re-
marking. The pane shown below appears.
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