This is a loopback on a cisco right?
Loopback is traditionally(unix world) is a virtual interface ( like
127.0.0.1 "localhost") used for testing software and other configurations
when you only have one ethernet or no ethernets.
The loopback on a cisco is used for multiple purposes but the most common is
for OSPF, VPN, BGP and other routing protocals. Here it's used as a normal
interface, but unlike a normal interface this loopback will never go down or
lose link.
If you have more questions I would recommend looking on Cisco's website for
their definition and that might help you.
As to why your seeing a scan? How are you seeing this are you doing a
debug?
==DMT>
> -----Original Message-----
> From: Giuliano Cardozo Medalha [SMTP:giuliano@usp.br]
> Sent: Wednesday, February 27, 2002 11:37 AM
> To: Todd, Douglas M.
> Cc:
> Subject: Re: RE: [nsp] Frame Relay - loopback
>
> OK, but I did not understand the meaning of that interface !!!
>
>
>
> When I create one and put a IP number on it, it start to scan all phisical
>
> interfaces to send packages ?
>
>
>
> Giuliano
>
>
>
> Em 27 Feb 2002, Todd, Douglas M. escreveu:
>
>
>
> >One reason is that loopback interfaces never go down or flap. Thus when
> you
>
>
> >use
>
> >a loopback interface for any purpose it's always up and never flapps.
>
> >
>
> >----SIGNAURE-------
>
> >Douglas M. Todd, Jr.
>
> >Network Engineering
>
> >CCNP, CCDA
>
> >Partners Health Care
>
> >Building 149
>
> >149 13 Street
>
> >Charlestown, MA 02129-200
>
> >Tel: 617.726.1403
>
> >Email: dtodd@partners.org
>
> >--------------------------------------------------------------------
>
> >PGP Finger Print: 9429 CAE3 B2D1 C2E1 DFBC E7A6 E90A 9BE5 C7B6 47BC
>
> >Key available via email.
>
> >Verisign S/N: 3ff65cdf58b9dceda004baeed49e16cf
>
> >https://digitalid.verisign.com/services/client/index.html
>
> >
>
> >> -----Original Message-----
>
> >> From: Giuliano Cardozo Medalha [SMTP:giuliano@usp.br]
>
> >> Sent: Wednesday, February 27, 2002 11:16 AM
>
> >> To: cisco-nsp@puck.nether.net
>
> >> Subject: [nsp] Frame Relay - loopback
>
> >>
>
> >> Hi,
>
> >>
>
> >>
>
> >>
>
> >> I would like to know why we point Frame Relay or ATM subinterfaces for
> a
>
>
> >> loppback interface ?
>
> >>
>
> >>
>
> >>
>
> >> Whats a loopback interface ?
>
> >>
>
> >>
>
> >>
>
> >> Thanks a lot
>
> >>
>
> >>
>
> >>
>
> >> Giuliano
>
> >>
>
> >>
>
> >>
>
> >
>
> >----------
>
>
>
This archive was generated by hypermail 2b29 : Sun Aug 04 2002 - 04:13:34 EDT