User guide

240 ExtremeWare 7.2e Installation and User Guide
Interior Gateway Protocols
Area 0 is the backbone area. It is located at the headquarters and has the following characteristics:
• Two internal routers (IR1 and IR2)
• Two area border routers (ABR1 and ABR2)
• Network number 10.0.x.x
• Two identified VLANs (HQ_10_0_2 and HQ_10_0_3)
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
• One identified VLAN (Chi_160_26_26)
• Two internal routers
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
• One identified VLAN (LA_161_48_2)
• Three internal routers
• Uses default routes for inter-area routing
Two router configurations for the example in Figure 47 are provided in the following section.
Configuration for ABR1
The router labeled ABR1 has the following configuration:
create vlan HQ_10_0_2
create vlan HQ_10_0_3
create vlan LA_161_48_2
create vlan Chi_160_26_26
configure vlan HQ_10_0_2 ipaddress 10.0.2.1 255.255.255.0
configure vlan HQ_10_0_3 ipaddress 10.0.3.1 255.255.255.0
configure vlan LA_161_48_26 ipaddress 161.48.2.26 255.255.255.0
configure vlan Chi_160_26_26 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
configure ospf area 0.0.0.6 stub nosummary stub-default-cost 10
configure ospf add vlan LA_161_48_2 area 0.0.0.6
configure ospf add vlan Chi_160_26_26 area 0.0.0.5
configure ospf add vlan all area 0.0.0.0
enable ospf
Configuration for IR1
The router labeled IR1 has the following configuration: