8-2 CHAPTER 8: IP UNICAST ROUTINGIn Figure 8-1, a Switch 3800 is shown with two VLANs defined: Financeand Personnel. Ports 1 and 3 are assigned to Finance; ports 2 and 4 areassigned to Personnel. Finance belongs to the IP network 192.207.35.0;the router interface for Finance is assigned the IP address192.206.35.1. Personnel belongs to the IP network 192.207.36.0; itsrouter interface is assigned IP address 192.207.36.1. Traffic withineach VLAN is switched using the Ethernet MAC addresses. Trafficbetween the two VLANs is routed using the IP addresses.Figure 8-1 Routing between VLANsPopulating theRouting TableThe Switch 3800 maintains an IP routing table for both network routesand host routes. The table is populated from the following sources:n Dynamically, by way of RIP packets or ICMP redirects exchangedwith other routersn Statically, by way of routes entered by the administratorn Default routes, configured by the administratorn Locally, by way of interface addresses assigned to theSwitch 3800n By other static routes, as configured by the administrator192.207.35.11 192.207.36.12 192.207.35.13 192.207.36.141Finance Personnel192.207.36.1192.207.35.12 3 4192.207.36.0192.207.35.0
