192 Summit 200 Series Switch Installation and User Guide
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.
NOTE
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 33, a switch is depicted with two VLANs defined; Finance and Personnel. Ports 2 and 4 are
assigned to Finance; ports 3 and 5 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 33: Routing between VLANs
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