Virtual Links Example 2 - D-Link NetDefend DFL-210 User Manual

Network security firewall ver 2.26.01
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4.5.2. OSPF
Chapter 4. Routing
In the above example, the Virtual Link is configured between fw1 and fw2 on Area 1, as it is used as
the transit area. In this configuration only the Router ID has to be configured. The diagram shows
that fw2 needs to have a Virtual Link to fw1 with Router ID 192.168.1.1 and vice versa. These
Virtual Links need to be configured in Area 1.
A Partitioned Backbone
OSPF allows for linking a partitioned backbone using a virtual link. The virtual link should be
configured between two separate ABRs that touch the backbone from each side and have a common
area in between.
Figure 4.8. Virtual Links Example 2
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