udld and cdp

Answered Question
Jul 15th, 2008

hi everybody!

does udld require cdp ? if not then how udld determines neighbor id neighbor port id?

thanks a lot!

I have this problem too.
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Correct Answer by Mark Yeates about 8 years 4 months ago

Sarah,

UDLD does not use CDP to detect it's neighbor. UDLD uses it's own form of hello messages to detect neighbors, and determine a fault. Here are some guides to help you further understand this.

http://www.cisco.com/en/US/docs/switches/lan/catalyst3550/software/release/12.1_19_ea1/configuration/guide/swudld.html#wp1042082

http://www.cisco.com/en/US/tech/tk389/tk621/technologies_tech_note09186a008009477b.shtml

Mark

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Correct Answer
Mark Yeates Tue, 07/15/2008 - 12:26

Sarah,

UDLD does not use CDP to detect it's neighbor. UDLD uses it's own form of hello messages to detect neighbors, and determine a fault. Here are some guides to help you further understand this.

http://www.cisco.com/en/US/docs/switches/lan/catalyst3550/software/release/12.1_19_ea1/configuration/guide/swudld.html#wp1042082

http://www.cisco.com/en/US/tech/tk389/tk621/technologies_tech_note09186a008009477b.shtml

Mark

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