Routing Considerations
When implementing VLANs, you'll need some type of route processor (RP). An RP is a device that can switch information either between logical subnets (VLANs) or physical subnets (as in the traditional router). If the RP is performing a traditional routing role, it could be switching packets between different LAN media types, such as fiber distributed data interface (FDDI), Ethernet, and token ring. For WAN connections, it provides access to ISDN, frame relay, ATM, and dedicated circuit networks.
The RP is the main system processor in a Layer 3 device. It contains the main CPU, the operating system software, and most of the system memory components. Its primary function is to maintain and execute the management functions ...
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