Re: Serial interface goes up and down
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)
> >
> > Any ideas ?
> >
> > Thanks,
> >
> > Bharat
> >
> >
> > _
> > FAQ, list archives, and subscription info:
> > http://www.groupstudy.com/list/cisco.html
> > Report misconduct and Nondisclosure violations to
> [EMAIL PROTECTED]
>
> _
> FAQ, list archives, and subscription info:
> http://www.groupstudy.com/list/cisco.html
> Report misconduct and Nondisclosure violations to
[EMAIL PROTECTED]
__
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Re: Serial interface goes up and down
set noi keepalive and see what happens if no keepalive solves the problem. Most likely there is some problem with keepalive messages between your router and the next hop If you are running frame-relay most likely LMI is not functioning properly , check LMI type hope this helps regards, suaveguru --- [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) > > > > Any ideas ? > > > > Thanks, > > > > Bharat > > > > > > _ > > FAQ, list archives, and subscription info: > > http://www.groupstudy.com/list/cisco.html > > Report misconduct and Nondisclosure violations to > [EMAIL PROTECTED] > > _ > FAQ, list archives, and subscription info: > http://www.groupstudy.com/list/cisco.html > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] __ Do You Yahoo!? Yahoo! Shopping - Thousands of Stores. Millions of Products. http://shopping.yahoo.com/ _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Serial interface goes up and down
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) > > Any ideas ? > > Thanks, > > Bharat > > > _ > FAQ, list archives, and subscription info: > http://www.groupstudy.com/list/cisco.html > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
