S
UMMIT
S
WITCH
I
NSTALLATION
AND
U
SER
G
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 Figure 10-5 are provided in the following
section.
C
ONFIGURATION
FOR
ABR1
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
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