SMC Networks SMC6824M manual 218, Changing Priorities Based on ACL Rules

CONFIGURING THE SWITCH

Changing Priorities Based on ACL Rules

You can change traffic priorities for frames matching the defined ACL rule. (This feature is commonly referred to as ACL packet marking.) This switch can change the IEEE 802.1p priority, IP Precedence, or DSCP Priority of IP frames; or change the IEEE 802.1p priority of Layer 2 frames.

Command Usage

•You must configure an ACL mask before you can change priorities based on a rule.

•Traffic priorities may be included in the IEEE 802.1p priority tag. This tag is also incorporated as part of the overall IEEE 802.1Q VLAN tag. The 802.1p priority may be set for either Layer 2 or IP frames.

•The IP frame header also includes priority bits in the Type of Service (ToS) octet. The Type of Service octet may contain three bits for IP Precedence or six bits for Differentiated Services Code Point (DSCP) service. Note that the IP frame header can include either the IP Precedence or DSCP priority type.

•The precedence for priority mapping by this switch is IP Precedence or DSCP Priority, and then 802.1p priority.

Command Attributes

•Port – Port identifier.

•Name – Name of ACL.

•Type – Type of ACL (IP or MAC).

•Precedence – IP Precedence value. (Range: 0-7)

•DSCP – Differentiated Services Code Point value. (Range: 0-63)

•802.1p Priority – Class of Service value in the IEEE 802.1p priority tag. (Range: 0-7; 7 is the highest priority)

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