[nsp] [OT] Layer 2 Trace

[Andrew Fort]

Ryan O'Connell wrote:

> There isn't one, because there is no vendor-independant way of tracing 
> layer 2 connections in that way - l2trace uses Cisco-specific 
> extensions (Specifically, it's based on CDP and last time I looked 
> only worked on CatOS - not IOS - switches) that, AFAIK, aren't 
> documented. Even if it was documented, it's not worth writing 
> something for Linux to do it as you may as well run it direct from the 
> switch if it's supported. (Using clogin or similar if required)


FWIW, the function is in the parser in recent 3550 code...

switch#traceroute mac ?
  H.H.H      48-bit hardware address of source
  interface  Interface on which this source mac exists
  ip         Specify ip addresses

Haven't (bothered) testing if this works, though :).