From: Brian McGahan (bmcgahan@internetworkexpert.com)
Date: Mon May 24 2004 - 16:36:12 GMT-3
A side note on what Brian mentioned here: For IOS versions that
require a dialer-group applied to the interface in order to encapsulate
traffic, you can either apply a dialer-list that doesn't exist or create
a dialer-list that denies traffic. For example:
Interface bri0/0
Dialer-group 1
!
Dialer-list 1 protocol ip deny
Again this is only for older versions that exhibit this
behavior.
HTH,
Brian McGahan, CCIE #8593
bmcgahan@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987 x 705
Outside US: 775-826-4344 x 705
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of
> Lord, Chris
> Sent: Monday, May 24, 2004 12:15 PM
> To: ccie2be; Richard Dumoulin; Beernink.William;
ccielab@groupstudy.com
> Subject: RE: ISDN Basics
>
> I have to go with ccie2be and Brian on this having just tested the
whole
> lot:
>
> You don't need the name parameter unless using ppp callback or not
using
> ppp chap hostname, etc (I didn't have auth configured in my case by
the
> way and I agree - always check operation without auth and then add it
> later!)
>
> I should have realised the core of all this which is you need L2-L3
> mapping. Without the dial string on one end I did in fact get
> encapsulation errors, duh!!
>
> I'm using IOS 12.2(13) and traffic will pass without having
dialer-group
> configured on one end.
>
> I think I have it clear now. Thx for the contributions.
>
> C.
>
> -----Original Message-----
> From: ccie2be [mailto:ccie2be@nyc.rr.com]
> Sent: Monday, May 24, 2004 5:55 PM
> To: Richard Dumoulin; Beernink.William; Lord, Chris;
> ccielab@groupstudy.com
> Subject: Re: ISDN Basics
>
>
> Richard,
>
> I have to respectfully disagree with you. Based on my understanding,
the
> name option of the dialer map command is only required in one
situation;
> ppp callback. If ppp callback isn't configured, all other isdn dial
> scenario's should work fine, even though most examples show the name
> option
> being used.
>
> Even if you're using chap or pap authen, it will work without the name
> option included in the dialer map command. Of course, you'll need to
> define
> the name using other commands such as username --- password --- or ppp
> chap
> hostname or something else.
>
> Based on the info provided in the original question, I would also
think
> that
> authen wasn't the issue because Chris said the circuit came up. I
suppose
> it's possible that, in reality, the circuit didn't really come up but
it
> just seemed that way because Chris noticed the rtr dialing but didnt'
> notice
> the other end rejecting the call.
>
> And, I would suggest to Chris that before configuring any authen, he
> should
> first make sure he can ping across the circuit so that he knows for
sure
> that authen isn't an issue.
>
> HTH
> ----- Original Message -----
> From: "Richard Dumoulin" <richard.dumoulin@vanco.es>
> To: "Beernink.William" <william.beernink@siemens.com>; "Lord, Chris"
> <chris.lord@lorien.co.uk>; <ccielab@groupstudy.com>
> Sent: Monday, May 24, 2004 12:06 PM
> Subject: RE: ISDN Basics
>
>
> > Yes, normally this is because the name of the other end router was
not
> > configured on the dialer map,
> >
> > --Richard
> >
> > -----Original Message-----
> > From: Beernink.William [mailto:william.beernink@siemens.com]
> > Sent: lunes, 24 de mayo de 2004 17:59
> > To: Lord, Chris; ccielab@groupstudy.com
> > Subject: RE: ISDN Basics
> >
> >
> > Hi Chris,
> >
> > Another option would be using a dialer rotary group on the remote
site.
> To
> > your problem about not getting an answer on your ping, there is most
> likely
> > a problem with authentication.
> >
> > regards William
> >
> > -----Original Message-----
> > From: Lord, Chris [mailto:chris.lord@lorien.co.uk]
> > Sent: maandag 24 mei 2004 17:25
> > To: ccielab@groupstudy.com
> > Subject: ISDN Basics
> >
> >
> > Hi,
> >
> > I would be greatful if anyone could assist me with a very basic ISDN
> query.
> > If a task specifies that a call should only be initiated by one end
of
> the
> > link, I'm trying to sort out exactly what options are available to
> satisfy
> > this.
> >
> > I'm only aware of two ways. One is to omit the "dialer-group" from
one
> end
> > so no interesting traffic is specified and the other is to remove
the
> dial
> > string from the "dialer map" statement at one end so it can't
physically
> > dial out. Are there any other obvious techniques.
> >
> > Also, assuming I have a "dialer-list 1 proto ip permit" and
"dialer-gr
> 1"
> at
> > both ends but I omit the dial string from one of the "dialer map"
> > statements, the link comes up in one direction as desired but ping
won't
> > work even though the link is up. Why is this?
> >
> > Thanks,
> >
> > Chris
> >
> >
> >
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