or u ahve the interface command enabled
DOWN WHEN LOOPED
<[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> There can be a lot of reasons for the "Line protocol down"
>
> 1. The cable connected from the router may be Bad.
> 2. The CU is not sending the clock. Check whether all the pins such as
> DCD, DSR, DTR,RTS,CTS are UP.
> 3. There should be same config for Keepalive at both the ends. Either no
> keepalive or keepalive set
> 4. The encapsulation type should be same at both the ends.
> 5. The cable is not connected at the remote end.
>
> Waiting for your feedback
>
> Hitesh
> CCNA
>
>
>
>
>
> "Atif Awan" <[EMAIL PROTECTED]> on 07/04/2000 10:40:53 AM
>
> Please respond to "Atif Awan" <[EMAIL PROTECTED]>
>
> To: "ANIL.YADAV" <[EMAIL PROTECTED]>, "Mike Narine"
<[EMAIL PROTECTED]>
> cc: [EMAIL PROTECTED] (bcc: harora)
> Subject: RE: Serial0 is up, line protocol is down!
>
>
>
>
>
> The router sees the packets with its own keepalive sequence numbers so
> thats
> why it knows that there is a loopback in place.
> Atif
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
> ANIL.YADAV
> Sent: Tuesday, July 04, 2000 9:44 AM
> To: Mike Narine
> Cc: [EMAIL PROTECTED]
> Subject: RE: Serial0 is up, line protocol is down!
>
>
> I'm doing this loopback test on the back side of interface, its aphysical
> loop.
> earlier I thought it could be because of different protocols being used at
> the other end of the serial link.
> thanks.
>
> On Tue, 4 Jul 2000, Mike Narine wrote:
> > How are you connecting? Are the routers back-to-back or are you
> connecting
> > to a Frame/T1/etc?
> > Make sure your encaps are the same (do a show int s0 to verify). Also,
> are
> > both ends showing the same stats for the Serial interface.
> > Line Protocol might not be coming up when there's a loop because the
> command
> > "down-when-looped" might be on... check your running cofig.
> > Good luck.
> >
> > -Mike
> >
> > -----Original Message-----
> > From: ANIL.YADAV [mailto:[EMAIL PROTECTED]]
> > Sent: Monday, July 03, 2000 11:23 PM
> > To: Omer Shommo
> > Cc: Cisco Group Study
> > Subject: Re: Serial0 is up, line protocol is down!
> >
> >
> >
> > Hi!!
> > everybody
> >
> > I'm facing a starnge problem. Even if I put a physical loop oan the
> serial
> > interface my protocol doesn't come up it shows me something like this
> >
> > Serial1 is up, line protocol is down (looped)
> >
> > tried varios options but doesn' help.
> >
> >
> > thanks
> > anil
> >
> >
> > On Fri, 23 Jun 2000, Omer Shommo wrote:
> >
> > > Hello to All,
> > >
> > > If Serial0 is up, line protocol is down, then what should I check?
Give
> me
> > as many answers as you can.
> > >
> > > BTW what is the line protocol? is it a network protocol like ip, ipx?
> or
> > is it the data link layer protocol?
> > >
> > > Omer
> > >
> > >
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