[c-nsp] Identifying device(s) connected to cisco L2-only switch

[Jeffrey Denton]

On Sun, Nov 2, 2008 at 6:20 AM, Jeffrey Denton <dentonj at gmail.com> wrote:
>
> Nothing elegant...
>
> You could always shutdown the port and wait for someone to complain.
>
> If it's not randomly generating traffic, then it's not a windows box.
> Switches tend to be noisy with layer 2 protocols.  Firewall or
> UNIX/Linux based system?  Does the duplex and speed show up as
> auto-negotiated (a-full, a-100)?
>
> You could try "no switchport" and the "ip add dhcp" on the interface
> to see if you can generate a response that way.  Set an IP on the
> interface so that you can "ping 192.168.1.255 source ...".  Pinging
> broadcast addresses might speed up the process.
>
> Setting up a SPAN or RSPAN might help you capture some traffic.
>
> "test cable-diagnostics tdr interface ..." would at least tell you how
> long the cable is.
>
> Setup the port as a trunk or port-channel or .... with
> auto-negotiation and see what happens.
>
> Set the switch up as a management cluster and then run "show cluster members".
>
> Use the other suggestions....
>

SNMP sweeps....