Extreme networks Summit1 Manuale Utente

S

UMMIT

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WITCH

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NSTALLATION

 

AND

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SER

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UIDE

10-17

OSPF C

ONFIGURATION

 E

XAMPLE

Area 5 is connected to the backbone area by way of ABR1 and ABR2. It is located in 
Chicago and has the following characteristics:

Network number 160.26.x.x

1 identified VLAN (Chi_160_26_26)

2 internal routers

A virtual link from ABR1 to ABR2 that traverses both internal routers.

In the event that the link between either ABR and the backbone fails, the virtual link 
provides a connection for all routers that become discontiguous from the backbone.

Area 6 is a stub area connected to the backbone by way of ABR1. It is located in Los 
Angeles and has the following characteristics:

Network number 161.48.x.x

1 identified VLAN (LA_161_48_2)

3 internal routers

Uses default routes for inter-area routing

Two router configurations for the example in 

 are provided in the following 

section.

The following is the configuration for the router labeled ABR1:

create vlan HQ_10_0_2

create vlan HQ_10_0_3

create vlan LA_161_48_2

create vlan Chi_160_26_2

config vlan HQ_10_0_2 ipaddress 10.0.2.1 255.255.255.0

config vlan HQ_10_0_3 ipaddress 10.0.3.1 255.255.255.0

config vlan LA_161_48_2 ipaddress 161.48.2.2 255.255.255.0

config vlan Chi_160_26_2 ipaddress 160.26.2.1 255.255.255.0

create ospf area 0.0.0.5

create ospf area 0.0.0.6

enable ipforwarding

Summit.bk : 10PROT.FM  Page 17  Thursday, June 18, 1998  9:27 AM