From: dusth@comcast.net
Date: Mon Oct 10 2005 - 10:52:51 GMT-3
So if you have backup interface configure under the physicall frame interface, it's a better idea to configure end-to-end keepalive?
Dustin
-------------- Original message --------------
> Hi All,
>
> In addition to Arun note, with frame-relay the only feasible way to use
> backup is using the sub-interface.
>
> Point-to-Point : as long as the DLCI status go to Inactive or Deleted the
> sub-int will go down
> With multi-point however, all dlci's under that interface must go to
> Inactive or deleted.
>
> With the main interface, it will be up regardless of the status of DLCIs as
> it is talking via LMI to the switch.
>
> Regards,
>
> Anh Tran
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Arun
> Arumuganainar
> Sent: Saturday, 8 October 2005 1:14 AM
> To: Lee Donald; 'Stefan Grey'; ccielab@groupstudy.com
> Subject: Re: ISDN questions.
>
> Lee is correct .
>
> For "Backup interface" command to work you need to have your primary
> interface in down-down state and not admin down state .
>
> However to verify this . You can do the following .
>
> 1) Give shut on the remote side . Or
> 2) give no keepalive on the remote side .
>
> Pls. Note : If you are running Frame Relay both the techniques will not work
> unless and until FR switch is co-operating . In CCIE lab scenario if the
> above methods did not bring your interface down then pls. resort to
> End-to-end Keep alive .
>
> Pls. Note : Here is key is to make your router think remote side or the
> serial link is down . If that works , then your configuration will certainly
> work when network really goes down !!!
>
> Thanks and Regards
> Arun
> ----- Original Message -----
> From: "Lee Donald"
> To: "'Stefan Grey'" ;
> Sent: Friday, October 07, 2005 8:30 PM
> Subject: RE: ISDN questions.
>
>
> > Stefan,
> >
> > The isdn interface will remain in standby mode until the the ser0/0 is
> down,
> > not admin down.
> >
> > Pull the plug out!
> >
> > Regards
> >
> > Lee.
> >
> >
> >
> > -----Original Message-----
> > From: Stefan Grey [mailto:examplebrain@hotmail.com]
> > Sent: Friday, October 07, 2005 3:47 PM
> > To: ccielab@groupstudy.com
> > Subject: ISDN questions.
> >
> > Just don't understand.
> >
> >
> > R1 - R2. Between them int ISDN.
> >
> > 1. When I configure backup between them.
> > Interface s0/0
> > backup interface dialer 0.
> >
> > dialer 0 is getting to the standby mode.
> > When I type
> > interface s0/0
> > shut
> > dialer 0 is still in standby mode.
> > a) Why?? As I understand it should get out from standby mode
> automatically??
> >
> > Shouldn't it??
> >
> > b) Theoretically if we want to backup both serial links on R1 and R2.
> > R1:
> > int s0/0
> > backupinterface dialer 0
> >
> > R2:
> > int s0/0
> > backup interface dialer 0
> >
> > if for example we shut down only the interface of s0/0 of R1. Should
> > the connection be up between both routers. Could we by backup
> > interface functions in this way backup 2 links.
> >
> > Thanks a lot.
> >
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