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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Using IS-IS Pseudonode
Instead of treating a broadcast network as a fully connected topology, IS-IS treats a broadcast network as a pseudonode with links to each attached system.
Note
To reduce the number of full mesh adjacencies between nodes, multiaccess links are modeled as pseudonodes. As the name implies, this is a virtual node. One of the ISs on the link is designated to be the pseudonode; this node is called the designated intermediate system (DIS). All routers on the broadcast link, including the one elected to be DIS, form adjacencies with the pseudonode instead of forming n*(n–1) adjacencies with each other in a full mesh.
The DIS is responsible for generating pseudonode link-state packets, for reporting links to all systems on ...
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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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