From: Arun Arumuganainar (aarumuga@hotmail.com)
Date: Fri Oct 07 2005 - 12:13:51 GMT-3
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" <Lee.Donald@t-systems.co.uk>
To: "'Stefan Grey'" <examplebrain@hotmail.com>; <ccielab@groupstudy.com>
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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