May 2001
Intermediate to advanced
528 pages
12h 59m
English
Content preview from Cisco® Secure Internet Security Solutions
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Cisco Discovery Protocol (CDP)
Cisco Discovery Protocol (CDP) uses Layer 2 inquiries to find information about neighboring devices. CDP, enabled by default on IOS versions 11 and later, is extremely useful for both managing and troubleshooting devices. However, CDP has an inherent flaw: it will answer any device that sends the proper request. Because CDP information contains such items as the IOS version number, the name of the device, the network address of the device, and how that device is connected, the administrator should limit on which interfaces CDP packets are answered and sent.
If CDP is not being used internally on the network, it can be disabled with the following global command:
no cdp run
If CDP is required on the interior of ...
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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.