You would use BRI0 interfaces on R1 and R2 as backup interfaces to the
serial interfaces.
R1:
int s0
backup int bri0
backup delay 20 40 // Dial R2 if s0 is down for 20 secs, wait 40 secs to
disconnect once s0 is back up.
!
configure the BRI0 interface to dial R2
R2:
int s0
backup int bri0
backup delay 20 40
!
configure the BRI0 interface to dial R1
Depending on your configuration, you can use Dialer interfaces as the backup
interface that way your BRI can be used for other purposes. This is covered
pretty thoroughly with examples in the Cisco Press ACRC and BCRAN books.
Hope that helps
Russ..
""Omer Shommo"" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Suppose I have router R1 with s0 connected to s0 of router R2 through
Frame relay cloud. Both routers have ISDN
> interfaces. How do I configure the ISDN interface of R1 to automatically
dial R2 in case the serial link is down?
>
> Omer
>
>
>
>
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