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OSPF Configuration Example
Area 0
2
Headquarters
ABR 2
1000BASE-X NETWORK PORTS
1
2
3
4
ACTIVITY
5
6
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
LINK
LINK
DISABLED
160.26.25.1
Virtual link
160.26.25.2
10/100BASE-TX MDI-X NETWORK PORTS
1
2
3
4
5
6
7
8
LINK/ACTIVITY
9
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
18
17R 17
9
10
11
12
13
14
15
16
ACTIVITY
LINK
DISABLED
Area 5
Figure 9-5
shows an example of an autonomous system using OSPF
routers. The details of this network follow.
IR 2
GIGABIT ETHERNET SWITCH
1000BASE-X NETWORK PORTS
1
8
3
4
ACTIVITY
5
6
7
1
2
3
4
5
6
7
8
POWER
DIAG
1
2
3
4
5
6
7
8
LINK
LINK
DISABLED
10.0.3.2
10.0.3.1
GIGABIT ETHERNET SWITCH
8
7
POWER
DIAG
160.26.26.1
160.26.26.2
Chicago
10/100BASE-T ETHERNET SWITCH
WITH GIGABIT ETHERNET
1000BASE-X NETWORK PORTS
18
17R
17
ACTIVITY
POWER
LINK
DIAG
Figure 9-5 OSPF Configuration Example
Area 0 is the backbone area. It is located at the headquarters and has
the following characteristics:
2 internal routers (IR1 and IR2)
2 area border routers (ABR1 and ABR2)
Network number 10.0.x.x
2 identified VLANs (HQ_10_0_2 and HQ_10_0_3)
AT-9108, AT-8518, AT-8525, and AT-8550 User's Guide
10.0.1.2
10.0.1.1
ABR 1
10.0.2.1
1000BASE-X NETWORK PORTS
1
8
ACTIVITY
2
3
4
5
6
7
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
LINK
LINK
DISABLED
10/100BASE-TX MDI-X NETWORK PORTS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
LINK/ACTIVITY
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
ACTIVITY
LINK
DISABLED
Area 6 (stub)
IR 1
GIGABIT ETHERNET SWITCH
1000BASE-X NETWORK PORTS
1
8
2
3
4
ACTIVITY
5
6
7
1
2
3
4
5
6
7
8
POWER
DIAG
1
2
3
4
5
6
7
8
LINK
LINK
DISABLED
10.0.2.2
GIGABIT ETHERNET SWITCH
POWER
DIAG
161.48.2.2
Los Angeles
161.48.2.1
10/100BASE-T ETHERNET SWITCH
10/100BASE-TX MDI-X NETWORK PORTS
1000BASE-X NETWORK PORTS
WITH GIGABIT ETHERNET
1
2
3
4
5
6
7
8
18
LINK/ACTIVITY
9
10
11
12
13
14
15
16
17R
17
1
2
3
4
5
6
7
8
18
17R 17
ACTIVITY
POWER
9
10
11
12
13
14
15
16
LINK
DIAG
ACTIVITY
LINK
DISABLED
10/100BASE-T ETHERNET SWITCH
1000BASE-X NETWORK PORTS
WITH GIGABIT ETHERNET
10/100BASE-TX MDI-X NETWORK PORTS
1
2
3
4
5
6
7
8
18
9
10
11
12
13
14
15
16
LINK/ACTIVITY
17R
17
1
2
3
4
18
17R 17
ACTIVITY
POWER
LINK
DIAG
9
10
11
12
13
ACTIVITY
LINK
10/100BASE-T ETHERNET SWITCH
1000BASE-X NETWORK PORTS
WITH GIGABIT ETHERNET
18
5
6
7
8
17R
17
18
17R 17
ACTIVITY
POWER
14
15
16
LINK
DIAG
DISABLED
9-21
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