OSPF Virtual Link Configuration Case Study_4
OSPF Virtual Link This Blog contains the OSPF virtual link concepts with configuration on Cisco Routers. To know the basic concepts and configuration of ospf- ping here After the rush up of those concepts it may ease to follow though this blog. WHY Virtual Link ? Area 0 is the backbone of the OSPF network. It means that all the areas in the OSPF network must connect to the Area 0 . What happens if particular area is not able to connect to the Area 0 ? There is two solutions one is that we can take a cable from the router from one area that is not connected to the backbone and connect the cable to the Nearest ABR-- This is funny and most probably it is not going to be possible. Second is the most Good and Wonder full technique of OSPF that is VIRTUAL LINK. [caption id="attachment_215" align="alignnone" width="590"] OSPF Virtual Link[/caption] Let us take the above example It has Four Routes R1 R2 R3 R4 R1 is ASBR (Autonomous Sys...

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