> -----Original Message----- > From: Gert Doering [mailto:[EMAIL PROTECTED] > Sent: Wednesday, December 12, 2007 2:12 PM > To: Furnish, Trever G > Cc: [email protected] > Subject: Re: [c-nsp] CDP -- more than one neighbor on the same port? > > Hi, > > On Wed, Dec 12, 2007 at 01:58:07PM -0500, Furnish, Trever G wrote: > > Under what circumstances would CDP show more than one neighbor on the > > same port? > > "dumb switch" in between (that floods CDP packets to all ports, instead > of handling them itself). > > > We have a site where the local IT staff is claiming that a switch > > interface (switch2 g0/2) is connected directly to exactly one other > > cisco switch, but 'show cdp nei' on switch 2 shows three other > > switches as neighbors on that interface. > > Maybe it's a cisco dumb switch (linksys?) that doesn't speak CDP.
Jeff's guess was actually correct -- it's gigastack, which seems to be a 10Gbps half-duplex bus. > It will quite happily traverse anything that is not actively handling > these frames. Thanks. That's what I suspected -- I just thought I had read that it wouldn't traverse non-cdp switches, and I never understood why that would be true. It's nice to have some confirmation that makes sense. > gert Thanks, Gert. _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
