Since this is frame relay, an easy way to test it is to change your LMI type
on the interface to a type not being used and within 10/15 seconds the
interface will go down and the backup interface should go active.
Also, Backup does not work on multipoint sub-interfaces with the loss of a
PVC.
JOE
CCNP, CCDP, and a few other things...
CCIE Lab - May 27/28
"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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