User guide

3-50 Packet Over SONET Module Installation and User Guide
Configuring the PoS Module
where:
If you omit the
no-congestion and congestion keywords, the command applies the
mapping to the tables for both states.
If you omit the
egress and ingress keywords, the command applies the mapping to
the egress direction, and automatically configures a symmetrical mapping (with the
input_codepoint and output_codepoint values reversed) in the ingress direction.
By default, all the tables are initialized such that DSCPs are not altered by the mapping
operations. For example, an input DSCP value of n is always mapped to an output
DSCP value of n.
Resetting DiffServ Code Point Mapping Tables
To reset the DSCP mapping tables for a specified PoS port to their default values, use
the following command:
unconfig diffserv dscp-mapping ports <portlist>
Replacing DiffServ Code Points
To replace DiffServ code points, you must use the following command to enable
DiffServ replacement:
enable diffserv replacement ports [<portlist> | all]
You then change the 802.1p priority to DiffServ code point mapping to any code point
value using the following command:
input_codepoint Specifies one of the 64 possible DiffServ code point values as the
input code point.
output_codepoint Specifies one of the 64 possible DiffServ code point values as the
output code point.
egress Applies the DSCP mapping to the egress direction.
no-congestion Applies the DSCP mapping to the egress mapping table for the
non-congested state.
congestion Applies the DSCP mapping to the egress mapping table for the
congested state.
ingress Applies the DSCP mapping to the ingress direction.