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Dell Configuration Guide for the S4048–ON System 9.14.2.5

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Area Border Router (ABR)

Within an AS, an area border router (ABR) connects one or more areas to the backbone.

The ABR keeps a copy of the link-state database for every area it connects to, so it may keep multiple copies of the link state database. An ABR takes information it has learned on one of its attached areas and can summarize it before sending it out on other areas it is connected to.

An ABR can connect to many areas in an AS, and is considered a member of each area it connects to.


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