November 1999
Intermediate to advanced
576 pages
15h 3m
English
book
Large-Scale IP Network Solutions (CCIE Professional Development)
by Khalid Raza - CCIE, Mark Turner
Content preview from Large-Scale IP Network Solutions (CCIE Professional Development)
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The OSPF Area Concept
One of the most important concepts in OSPF is the existence of hierarchy and areas. OSPF allows collections of contiguous networks to be grouped together. Such a group, together with the routers maintaining interfaces to any of the included networks, is called an area. Each area runs a separate copy of the basic link-state routing algorithm.
Rather than treating the entire autonomous system as a single link-state domain, the topology of an area can be hidden. It is then invisible from the outside of the area. Similarly, routers in other areas know nothing of the topology outside their own area, which markedly reduces routing traffic.
Now that multiple areas are created in the network, there is no need for all the routers ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.