[rancid] Re: Searching for Half-duplex Interfaces

Pabon, Nestor NPabon at archstonesmith.com
Fri Jan 11 21:33:32 UTC 2008

I'm not sure I conveyed my goal correctly.

If I use clogin or log directly into the router I know I can query
issuing the following:

"sh interface | i Half-duplex"

But this will only return something like:

"Half-duplex, 10Mb/s, 100BaseTX/FX"

I rather do a:

"show int"

And have the output go to a file named


And then somehow get a report which will give the device name which had
an interface set to Half-duplex".

Hope this helps.


-----Original Message-----
From: Lance [mailto:rancid at gheek.net] 
Sent: Friday, January 11, 2008 1:56 PM
To: Pabon, Nestor
Cc: rancid-discuss at shrubbery.net
Subject: RE: [rancid] Searching for Half-duplex Interfaces

use clogin and do a sho int for each interface. the look for half
somewhere in the output of the show interface.

> -------- Original Message --------
> Subject: [rancid]  Searching for Half-duplex Interfaces
> From: "Pabon, Nestor" <NPabon at archstonesmith.com>
> Date: Fri, January 11, 2008 1:31 pm
> To: <rancid-discuss at shrubbery.net>
> First of all I want to thank the developers for such a great tool.
> I need to discover in a network of 200+ routers, which ones have
> FastEthernet interfaces; either 0/0 or 0/1 set to "Half-duplex".
> Can someone help me script this query?
> My objective is to investigate why they are set to Half-duplex, and
> change them to full or hard code them where appropriate.
> Regards,
> Nestor<hr>_______________________________________________
> Rancid-discuss mailing list
> Rancid-discuss at shrubbery.net
> http://www.shrubbery.net/mailman/listinfo.cgi/rancid-discuss

More information about the Rancid-discuss mailing list