You could also shut down the serial interface on the far end of the link so
that the interface goes into a down/down state. Brad is right,
administratively shutting down an interface will not trigger the backup link
to come up.
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
Brad Ellis
Sent: Thursday, May 25, 2000 7:13 PM
To: [EMAIL PROTECTED]
Subject: Re: Backup interface never comes up.
the SHUT command on your primary interface will not bring the backup
interface up. so what you are seeing is definitely normal. if your backup
interface DID come up from a shut command on your primary interface, then
I'd say you have a broken router!
try using a floating static route instead...or pull the cable off the serial
port
-brad
"James Xie" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Hi,
>
> I am doing a study on DDR. On my router, I configured the bri0
interface, and
> it works fine. The router can place a call to the other end and traffic
> passes through
> perfectly. (It means all the isdn interface and dialer configuration are
> correct).
>
> My problem is, once i placed the interface as a backup for another
serial
> interface
> (frame relay ), the bri0 is placed in standby mode automatically and even
> the layer 1
> and layer 2 for the bri0 are administratively shutdown automatically. I
> tried to shutdown
> the primary frame relay interface and the backup bri0 never comes up.
>
> I tried it on different routers with the same result.
>
> Is this behavior normal or I missed something?
>
> Thank you very much for advice.
>
> Jim.
>
> Attached is my configuration sample:
>
> int s0
> encapsulation frame-relay
> ip address 10.1.1.1 255.255.255.0
> backup delay 10 30
> backup interface bri0
> no shut
>
> int bri0
> encapsulation ppp
> ip address 10.1.2.1 255.255.255.0
> isdn switch-type basic-ni1
> isdn spid1 12345678 1234
> isdn spid2 23456789 2345
> dialer-group 1
> dialer map ip 10.1.2.2 broadcast 6789
> no shut
> ..............
>
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