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CCIE Routing and Switching Exam Certification Guide

Chapter Description

Prepare for the CCIE Routing and Switching Exam with this excellent study resource. Review such topics as MAC address format, VLAN trunking, transparent bridge functions, and much more.

RIF

RIF contains a 2-byte RIF header and one or more route descriptors. Each route descriptor contains a 12-bit ring number and a 4-bit bridge number. The values for the Type field contained in the header indicate the following:

  • 00—Nonbroadcast (specific route): Indicates that this is a regular frame that should be routed to the destination following the information in the route descriptors.

  • 10—All-routes broadcast: Indicates that this is an all-rings explorer packet that should take all possible routes to the destination.

  • 11—Single-route: Indicates that this is a limited broadcast that should take one path to the destination.

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