From: Brian Dennis (brian@xxxxxx)
Date: Mon Aug 19 2002 - 15:38:51 GMT-3
If you don't have a dialer-list you need to take into account that the
remote router will not have any interesting traffic. If the local router
with the backup interface command makes an ISDN call, the longest the
line will be up is 120 seconds due to the fact that the remote router
doesn't have any interesting traffic and is dropping the line when its
idle-timeout expires. I would suggest just not giving the remote router
a number to call or at least adjusting the dialer idle-timeout to
something really high.
Brian Dennis, CCIE #2210 (R&S/ISP Dial)
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Brian McGahan
Sent: Monday, August 19, 2002 10:35 AM
To: 'kasturi cisco'; ciscoworks2001@yahoo.com; ccielab@groupstudy.com
Subject: RE: Backup Interface and IGRP
Kasturi,
Not a restrictive dialer-list, *no* dialer-list. If the local
interface is in standby mode, there will never be a circumstance that
the remote side is allowed to dial in. Even if it does dial in, the
local side will not answer since the interface is in standby.
Brian McGahan, CCIE #8593
Director of Design and Implementation
brian@cyscoexpert.com
CyscoExpert Corporation
Internetwork Consulting & Training
http://www.cyscoexpert.com
Voice: 847.674.3392
Fax: 847.674.2625
-----Original Message-----
From: kasturi cisco [mailto:kasturi_cisco@hotmail.com]
Sent: Monday, August 19, 2002 12:30 PM
To: brian@cyscoexpert.com; ciscoworks2001@yahoo.com;
ccielab@groupstudy.com
Subject: RE: Backup Interface and IGRP
Armand,
Looks like the IGRP traffic is the interesting traffic from remote end.
As Brian wrote since there is no need for this traffic to dialin deny
this traffic at the remote end. Create a restrictive dialer list and
deny this traffic - may be dialer list 1 deny igrp any any or may be ip
any any ?
When u deny this traffic it wont dialin. There wont be a need as u are
using backup interface so when the local side (side where backup
interface cmd is placed) has physical interface in down state it will
dial out and establish connection.
Am i right ? this should work as u say snapshot routing is not
allowed.Which case study is this ?
Let us know.
Good Luck,
Kasturi.
>From: "Brian McGahan"
>To: "'Armand D'" , "'kasturi cisco'" ,
>Subject: RE: Backup Interface and IGRP
>Date: Mon, 19 Aug 2002 11:30:28 -0500
>
>Armand,
>
> Don't put interesting traffic on the remote side. Assuming this
>is only a point-to-point dial scenario, and the local side is in
backup,
>there will never be a case where the remote side should be dialing at
>all.
>
>Also, "debug dialer packet" will give you more detailed information
>about what traffic is interesting or not.
>
>
>HTH
>
>Brian McGahan, CCIE #8593
>Director of Design and Implementation
>brian@cyscoexpert.com
>
>CyscoExpert Corporation
>Internetwork Consulting & Training
>http://www.cyscoexpert.com
>Voice: 847.674.3392
>Fax: 847.674.2625
>
>
>-----Original Message-----
>From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
>Armand D
>Sent: Monday, August 19, 2002 11:06 AM
>To: kasturi cisco; ccielab@groupstudy.com
>Subject: Re: Backup Interface and IGRP
>
>Hi,
>
>I am prevented from using snapshot and watch-lists.
>I'm trying to use the backup interfcace so this router
>only dials when it loses connectivity on its primary
>port. It appears that igrp brings the call back up
>from the remote side from the show dialer cmd: Dial
>reason: ip (s=135.4.35.6, d=255.255.255.255)
>
>Is there any way to prevent this call back issue ?
>
>Thanks,
>
>Armand
>
>--- kasturi cisco wrote:
> > Armand,
> >
> > If u look at the debugs (maybe easier in lab to use
> > the show dialer cmd as
> > this generates less amount of info than
> > debug)...gives similiar info for
> > troubleshooting...The show dialer cmd will show the
> > dial reason which helps
> > to find why link is going UP/DOWN
> >
> > When u look at the output it shows bcast as dest
> > address
> > >
> > >1w3d: BRI0/0: ip (s=135.4.35.5, d=255.255.255.255),
> > >186 bytes, outgoing interesting (list 100)
> >
> > The router with Src address shown above is
> > generating IGRP routing updates
> > and hence these updates. To the best of my knowledge
> > the ways to do this is
> >
> > - if u deny igrp routing updates and use static
> > routes (may not be a option)
> >
> > - USe snapshot routing as this prevents the DV
> > protcols form sending updates
> > every "update interval"
> >
> > I cant think of any other way ? anyone care to add
> > ??
> >
> > HTH.Are u prevented from using Snapshot ?? by the Q
> > or Secenario.
> >
> > Good luck,
> > kasturi.
> >
> >
This archive was generated by hypermail 2.1.4 : Sat Sep 07 2002 - 19:48:29 GMT-3