ADC Campus-REX2 RS IP ROUTING, Static Routing, IP R

Chapter 8 - Internetworking and Management Overview

To enable or disable Spanning Tree, see “Configuring Spanning Tree Protocol” on page 33. The following elements are required for managing the Spanning Tree active topology:

•assigning a priority to each bridge relative to all bridges within the bridged LAN

•assigning a priority to each bridge port relative to all ports on a bridge

•assigning a path cost to each port

IP ROUTING

The Campus-REX2 offers both dynamic and static routing.

Static Routing

Through the static IP routing feature, you can configure the Campus-REX2 as an IP router with statically programmed route entries. You can enable this function as a security feature to prevent eavesdropping and to provide broadcast filtering, as well as to specify multiple destination gateways. When static IP routing is enabled, you can access only specific remote IP subnets or hosts.

Since IP routers make forward or filter decisions based on the network-layer IP address instead of the MAC hardware address, MAC-level broadcast frames are prevented from reaching unwanted destinations in the network.

The following example shows a simple Internet Service Provider (ISP) site that uses the static IP routing feature to filter MAC-level broadcast frames sourced by ISP Subscriber A from reaching ISP Subscriber B. In this example, all frames from Subscriber A and Subscriber B are directed to the router at the Network Access Provider site. From there, frames from both subscribers are forwarded directly to the Internet.

126 Campus-REX2 RS Interface Card User Manual