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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IS-IS Packets
As discussed earlier, link-state protocols maintain information received from neighbors. Any information received from a neighbor is maintained in a database. Because link-state protocols require the information to be constant among neighbors, IS-IS has different protocol packets. Essentially, IS-IS has four packet types:
Hello packets
LSPs
CSNP data units
PSNP data units
Each of these is discussed in more detail in the following sections.
Hello Packets
Hello packets are sent to multicast MAC-layer addresses to determine whether other systems are running IS-IS. There are three types of hello packets in IS-IS: one for point-to-point interfaces, one for level 1 routers, and one for level 2 routers. The hellos sent to level 1 and ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.