S.,
I've seen this situation. This could be the
problem: The local end goes up & down. Distant end
stays down. The problem is you're receiving
keepalives and the distant end is not. These
keepalives you receive have a sequence number on them
that should increment ("your's seen"). Keepalives are
sent every 10 seconds by default. Since the distant
end isn't receiving your keepalives, your's seen
doesn't increment. After missing seeing three
keepalives that are not incrementing, IOS declares the
interface down. As soon as the next keepalive is
recieved, the interface is placed up. And so the
cycle continues. Check the transmit pins/cable/to the
distant end. Keep in mind it could be your local
transmit or the distant end receive.
Chris M.
--- [EMAIL PROTECTED] wrote:
> Hi all,
>
> I am facing a similar problem. The Serail link s0
> changes state. I noticed a
> pattern. The line protocol is up for 10 secs and
> down for next 20 secs and the loop contnues. Could
> anyone throw some light on
> what could be the possible reasons for this. All
> replies are thankfully
> acknowledged in advance.
>
> S.Kalidasan
>
>
>
>
>
> > Hi all,
> >
> > I'm trying to configure a 2501. There's nothing in
> the flash. I configured
> > the E0 with an IP and connected it to a laptop.
> I'm trying to upload the
> IOS
> > but the interface keeps going up and down :
> >
> >
> > %LINEPROTO-5-UPDOWN: Line protocol on Interface
> Ethernet0, changed state to
> > up
> > %LINEPROTO-5-UPDOWN: Line protocol on Interface
> Ethernet0, changed state to
> > down
> >
> > %LINEPROTO-5-UPDOWN: Line protocol on Interface
> Ethernet0, changed state to
> > up
> > %LINEPROTO-5-UPDOWN: Line protocol on Interface
> Ethernet0, changed state to
> > down
> >
> > %LINEPROTO-5-UPDOWN: Line protocol on Interface
> Ethernet0, changed state to
> > up
> > %LINEPROTO-5-UPDOWN: Line protocol on Interface
> Ethernet0, changed state to
> > dow
> >
> > The prompt I'm at is : Lab_D(boot)œ
> >
> > Any ideas ?
> >
> > Thanks,
> >
> > Bharat
> >
> >
> > _________________________________
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>
> _________________________________
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