> # Information About Class Map Creation

> Using the class map feature you can create and define traffic class with match criteria to identify traffic belonging to that class. The class map name is restricted to 63 alphanumeric characters and defaults to the match-all option. Flow-based traffic uses one of the following values:

> - WWN—The source WWN or the destination WWN.
> - Fibre Channel ID (FC ID) —The source ID (SID) or the destination ID (DID).
> - Source interface—The ingress interface.

> Use the class map feature to create and define a traffic class with match criteria to identify traffic belonging to that class. The class map name is restricted to 63 alphanumeric characters and defaults to the match-all option. Flow-based traffic uses one of the following values:

> - WWN—The source WWN or the destination WWN.
> - Fibre Channel ID (FC ID) —The source ID (SID) or the destination ID (DID). The possible values for mask are FFFFFF (the entire FC ID is used—this is the default), FFFF00 (only domain and area FC ID is used), or FF0000 (only domain FC ID is used).

> Note An SID or DID of 0x000000 is not allowed.

> - Source interface—The ingress interface.

> Tip The order of entries to be matched within a class map is not significant.

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