Priscilla Oppenheimer wrote: > > s vermill wrote: > > > > J. Johnson wrote: > > > > > > Is there a CDP config option that will tell a cisco box to > > keep > > > a log of CDP > > > activity? If so, how would an administrator access it? It > > > might be nice > > > to see a history of when neighbors come up or go down, or > when > > > they change > > > settings. > > There doesn't seem to be any such thing. It sure would be > useful. Send a message to Cisco to ask for an enhancement! > > The debug cdp command tells you some stuff but it's hard to > parse and tells you too much. It could be dangerous to enable > it, since it spews so much output every 60 seconds at least > (more if it's receiving CDP messages too). > > I think Scott just mentioned it because he discovered the debug > cdp ip command, which is indeed strange. We all know that CDP > is a data-link-layer protocol. > > Scott, I think it must be useful only when you're using > on-demand routing (ODR), which uses CDP, I guess. See here for > more info: > > http://www.cisco.com/warp/public/105/39.html > > _______________________________ > > Priscilla Oppenheimer > www.troubleshootingnetworks.com > www.priscilla.com > > >
The debug cdp command could get nasty indeed in a large network. I don't think it would be practical for what was being asked. When I first saw the 'debug cdp ip' command, I misread it to say something about DDR. Having done some DDR, I was mystified. CDP is often disabled on DDR links. ODR is something altogether different apparently. I'll read the full text soon. Just brushing over it was an eye-opener though. A purely L2 protocol to transport L3 reachability. It actually looks like it might be useful for small spoke sites. Hmmm... Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=61526&t=61471 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
