Intel 480T, User Manual

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C H A P T E R 1 0 IP Unicast Routing
Router Interfaces
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.
Each IP address and mask assigned to a VLAN must represent a
unique IP subnet. You cannot configure the same IP address and
subnet on different VLANs.
In Figure 18, a 480T switch is depicted with two VLANs defined;
Finance and Personnel . All 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; the router interface for Finance is assigned
the IP address 192.206.35.1. Personnel belongs to the IP network
192.207.36.0; its router interface is assigned IP address
192.207.36.1. Traffic within each VLAN is switched using the
Ethernet MAC addresses. Traffic between the two VLANs is routed
using the IP addresses.
Figure 18: Routing between VLANs
480t_004
1
Finance Personnel
192.207.36.0 192.207.35.0
192.207.36.1 192.207.35.1
2 3 4
192.207.36.14 192.207.35.13 192.207.35.11 192.207.36.12