Populating The Routing Table - Extreme Networks ExtremeWare XOS Guide Manual

IP Unicast Routing
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 55, a BlackDiamond switch is depicted with two VLANs defined; Finance and Personnel. All
ports on slots 1 and 3 are assigned to Finance; all ports on slots 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 55: Routing between VLANs
1 2 3
192.207.35.1
192.207.35.0
Finance
1 2 3
192.207.35.11
192.207.36.12

Populating the Routing Table

The switch maintains an IP routing table for both network routes and host routes. The table is
populated from the following sources:
Dynamically, by way of routing protocol packets or by Internet Control Message Protocol (ICMP)
●
redirects exchanged with other routers
Statically, by way of routes entered by the administrator:
●
Default routes, configured by the administrator
■
Locally, by way of interface addresses assigned to the system
■
By other static routes, as configured by the administrator
■
ExtremeWare XOS 11.1 Concepts Guide
4 A B
192.207.36.1
192.207.36.0
4
192.207.35.13
192.207.36.14
5 6 7
Personnel
8
EX_070
366