udld and cdp

[sarahr202]

hi everybody!

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

thanks a lot!

[Mark Yeates · Accepted solution]

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

[sarahr202]

Thanks Mark for your reply and link. I got it now!

[shubhamkumarhcl]

http://www.ccnaccnplinux.com/2016/07/cdp-vs-lldp.html

http://www.ccnaccnplinux.com/2016/07/udld.html