31 Jul
1997
31 Jul
'97
1:39 p.m.
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. Glynn 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