From: Adam Crisp (adam.crisp@totalise.co.uk)
Date: Tue Sep 10 2002 - 16:25:33 GMT-3
If this is an ISDN - OSPF demand circuit link that is flapping, where you've
tried to surpress HELOs....
then remember that a routing flap elsewhere in the network will trigger an
update.
ensure you have the "bandwidth" command on ALL interfaces in you network,
because this can cause high OSPF costs where you don't expect them.
the ISDN link might seam a good alternative where you don't want it to,
Adam
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Song Mu
Sent: 10 September 2002 14:47
To: Hung, Sing-Yu; Dennis adekola
Cc: ccielab@groupstudy.com
Subject: RE: ISDN Flapping
Sing-Yu,
It is a hidden command. 12.2 is no problem, I am not sure for 12.1.
Just type in debug ip ospf monitor, see if it accepts it. According
to your information, it looks like you have some sort of access-list
applied somewhere. It triggered the dial and then be denied.
hope this will help,
Song
--- "Hung, Sing-Yu" <Sing-Yu.Hung@pccw.com> wrote:
> Dear,
>
> I couldn't find "debug ip ospf monitor" under 2500 ios 12.1.
>
> Bradford Hung
>
> > Pacific Century CyberWorks
> > Tel: 288 33125
>
>
> -----Original Message-----
> From: Dennis adekola [mailto:Dennis.adekola@snsl.co.uk]
> Sent: Tuesday, September 10, 2002 7:08 PM
> To: Hung, Sing-Yu
> Cc: ccielab@groupstudy.com
> Subject: Re: ISDN Flapping
>
>
> Could you try doing a "debug ip ospf monitor".
> This would probably point out what is triggering the link
>
> From a guessing point of view, it seems what you have determined as
> interesting traffic in your dialer list is what is bring up the link.
>
> Just my input
>
> Dennis
>
> >>> "Hung, Sing-Yu" <Sing-Yu.Hung@pccw.com> 09/10/02 11:30AM >>>
> Dear all,
>
> I wopuld like to ask if there is ISDN flapping as below:
>
> *Mar 4 01:07:54: Di0 DDR: ip (s=140.4.56.1, d=224.0.0.5), 264 bytes,
> outgoing interesting (ip PERMIT)
> *Mar 4 01:07:54: Di0 DDR: cdp, 279 bytes, outgoing uninteresting (no
> list
> matched)
> *Mar 4 01:07:58: Di0 DDR: ip (s=140.4.56.1, d=224.0.0.5), 164 bytes,
> outgoing interesting (ip PERMIT)
> *Mar 4 01:08:29: %LINEPROTO-5-UPDOWN: Line protocol on Interface
> Async1,
> changed state to down
> *Mar 4 01:08:29: Di0 DDR: cdp, 10 bytes, outgoing uninteresting (no
> list
> matched)
> *Mar 4 01:08:32: %LINK-5-CHANGED: Interface Async1, changed state to
> reset
> *Mar 4 01:08:32: %DIALER-6-UNBIND: Interface As1 unbound from
> profile Di0
> *Mar 4 01:08:37: %LINK-3-UPDOWN: Interface Async1, changed state to
> down
> *Mar 4 01:08:54: Di0 DDR: cdp, 279 bytes, outgoing uninteresting (no
> list
> matched)
>
> Is there any method can help me find the problem. I try to use "deb
> ip ospf spf" but find it hard to trace the source of problem.Please
> give me
> some hints.
>
> YHX
>
> Bradford Hung
>
> Pacific Century CyberWorks
> Tel: 288 33125
>
**********************************************************************
> This e-mail and any files transmitted with it are confidential and
> intended
> solely for the use of the individual or entity to whom they are
> addressed.
> If you have received this e-mail in error you should not disseminate,
> distribute or copy this e-mail. If you have received this
> communication in
> error, please notify the sender immediately and delete this e-mail
> from your
> system.
>
> This footnote also confirms that this email message has been swept
> for the
> presence of computer viruses. However, it is the responsibility of
> the
> recipient to ensure that this email and any attachments are free from
> the
> presence of viruses. SNSL accept no responsibility for any loss or
> damage
> arising from the use of this email or attachments.
>
>
**********************************************************************
This archive was generated by hypermail 2.1.4 : Mon Oct 07 2002 - 07:43:48 GMT-3