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MPLS Fundamentals by Luc De Ghein - CCIE No. 1897

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The Table-Map Feature

The table-map is a conversion table between the different types of QoS that a packet can have. It allows you to map IP precedence, DSCP, MPLS EXP bits, qos-group, and Layer 2 cos information (the 802.1Q priority bits) via an MQC command. For example, you can map the IP precedence in the incoming IP packet to the EXP bits value of the outgoing labeled packet by using this table instead of specifying an MQC command for each value to be mapped. Table 12-5 shows the categories of QoS information that you can map and their values.

Table 12-5. Categories of QoS Information for Table-Map
Packet Marking CategoryValue Range
Cos0 to 7
IP precedence0 to 7
DSCP0 to 63
Qos-group0 to 99
MPLS EXP imposition0 to 7
MPLS EXP topmost0 to 7

Table ...

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