3com 9000 SX Manual De Usuario

This chapter describes how to configure IP routing on the Switch 9000. 
It assumes that you are already familiar with IP unicast routing. If not, 
refer to the following publications for additional information:

RFC 1058 — Routing Information Protocol

RFC 1256 — ICMP Router Discovery Messages

RFC 1723 — RIP Version 2

RFC 1812 — Requirements for IP Version 4 Routers

The Switch 9000 provides full Layer 3, IP unicast routing. It exchanges 
routing information with other routers on the network using the 
Routing Information Protocol (RIP). The Switch 9000 dynamically builds 
and maintains a routing table, and determines the best path for each 
of its routes.

Each host using the IP unicast routing functionality of the Switch 9000 
must have a unique IP address assigned. In addition, the default 
gateway assigned to the host must be the IP address of the Switch 
9000 router interface.

The routing software and hardware routes IP traffic between router 
interfaces. A router interface is simply a VLAN that has an IP address 
assigned to it. 

As you create VLANs with IP addresses belonging to different IP 
subnets, you can also choose to route between the VLANs. Both the 
VLAN switching and IP routing function occur within the Switch 9000.

In Figure 8-1, a Switch 9000 is shown with two VLANs defined: Finance 
and Personnel. Ports 1 and 3 are assigned to Finance; ports 2 and 4 are 
assigned to Personnel. Finance belongs to the IP network 192.207.35.0; 

SW9000.BK  Page 1  Wednesday, April 1, 1998  11:00 AM