Sorry
I forgot to say that the link works just fine with the
DCE on the IOS 12.0 end. It doesn't work with the DCE
on the IOS 11.0 end. The 12.0 end always comes up and
the 11.0 end works just fine as a DTE.
Richard
--- Jason Kolevar <[EMAIL PROTECTED]> wrote:
> Are you sure you don't have a marginal cable, or
> does it do this with other
> cables as well? They're shouldn't be a
> compatibility issue between IOS
> versions.
>
> Jason.
>
> ----- Original Message -----
> From: "Richard Wilson" <[EMAIL PROTECTED]>
> Newsgroups: groupstudy.cisco
> Sent: Thursday, March 22, 2001 7:15 PM
> Subject: back-to-back serial interfaces
>
>
> > Hi
> >
> > I hate to revisit the old back-to-back serial
> problem
> > but I think I have a new twist. I've researched
> the
> > archives including Pamela's excellent March 15
> > response and can't seem to find anything that
> fits. I
> > think my problem is slightly different and I would
> > appreciate any insight the group can provide.
> >
> > I'm running two 2500s with a DCE/DTE cable between
> > serial ports. "Show Controller" correctly
> identifies
> > the DCE and DTE ends.
> >
> > One end is running IOS 11.0(17) and the other end
> IOS
> > 12.0(9). I can switch cable ends and in either
> case
> > the router on the DCE end accepts the "Clock Rate"
> > command with no problem.
> >
> > The twist is that the IOS 12 router accepts the
> "No
> > Shutdown" command and comes up. The 11.0 router
> > accepts the command but the line protocol stays
> down.
> > The "Show Interface" command identifies identical
> > configurations on both ends including HDLC
> > encapsulation.
> >
> > I'm assuming the difference is the IOS version and
> I
> > can certainly upgrade. Should I encounter this
> > problem in the field, however, I would like to
> > understand what's going on. Is there an IOS
> command
> > required in the earlier version that isn't
> required in
> > 12?
> >
> > Thanks in advance
> >
> > Richard
> >
> >
> > __________________________________________________
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