Populating The Routing Table - Extreme Networks Summit Summit1 Installation And User Manual

IP U R
NICAST OUTING
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 Summit.
In Figure 9-1, A Summit is depicted with two VLANs deÞned; 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; 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. TrafÞc within each VLAN is switched
using the Ethernet MAC addresses. TrafÞc between the two VLANs is routed using the
IP addresses.
192.207.35.0
Finance
1
192.207.35.11 192.207.36.12
Figure 9-1: Routing between VLANs
P
OPULATING THE
The Summit maintains an IP routing table for both network routes and host routes. The
table is populated from the following sources:
¥ Dynamically, by way of RIP packets or ICMP redirects exchanged with other routers
¥ Statically, by way of routes entered by the administrator
Ñ Default routes, conÞgured by the administrator
Ñ Locally, by way of interface addresses assigned to the Summit
Ñ By other static routes, as conÞgured by the administrator
9-2
192.207.35.1 192.207.36.1
2 3
192.207.35.13
R T
OUTING ABLE
192.207.36.0
Personnel
4
192.207.36.14
S S
UMMIT
I U
WITCH NSTALLATION AND SER
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UIDE