SMC Networks TigerSwitch 100 manual Mapping IP Precedence

CLASS OF SERVICE CONFIGURATION

Command Attributes

•IP Precedence/DSCP Priority Status – Selects IP Precedence, DSCP, or disables both priority services.

Web – Click Priority, IP Precedence Priority. Select IP Precedence or IP DSCP from the IP Precedence, DSCP Priority Status menu.

CLI – The following example globally enables IP Precedence service on the switch.

Console(config)#map ip precedence	3-156
Console#

Mapping IP Precedence

The Type of Service (ToS) octet in the IPv4 header includes three precedence bits defining eight different priority levels ranging from highest priority for network control packets to lowest priority for routine traffic. The default IP Precedence values are mapped one-to-one to Class of Service values (i.e., Precedence value 0 maps to CoS value 0, and so forth). Bits 6 and 7 are used for network control, and the other bits for various application types. ToS bits are defined in the following table.

Priority Level	Traffic Type
7	Network Control
6	Internetwork Control
5	Critical

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