North American Network Operators Group

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Re: [FYI] Broadcasts at NAPs

  • From: Glynn Stanton
  • Date: Sat Aug 02 23:53:41 1997

I knew as soon as I hit send that Id messed that up... obviously it cant
use HDLC or it wouldnt work on Ethernet/tokenring/fddi etc...

cdp is a media and protocol independnt protocol that runs athe data-link
layer, sending periodic messages to a multicast address.

yes it would use hdlc for serial lines, but not for anything else.

Sorry for any oconfusion.

On Thu, 31 Jul 1997, Glynn Stanton wrote:

> > 5841 = ??? (is this CDP?)
> I believe cdp uses the layer 2 HDLC protocol.
> Interesting troubleshooting tool, if you connect 2 cisco's together
> youll be able to sh cdp neigh and see it up even if IP isnt working.
> Glynn