In a message dated 10/26/00 8:55:55 PM Eastern Daylight Time,
[EMAIL PROTECTED] writes:
> My hunch is
> any router that detects link failure initiates isdn
> backup link first. am l right?
>
Well, lets say at your branch office you had the config on serial 0 that I
told you about where it specified that s1 was the backup interface (isdn). As
soon as serial 0 dropped, serial 1 would come up/up and become your link
untill the serial 0 came back. Serial 1 would stay up for that amount of time
you specified (0 300) to make sure that serial 0 was back up for good. You
could check on this by typing "show ip int brie". When this config is
properly set up and serial 0 is up and stable you will see that serial 1 is
not in a down/down state but instead in a standby/down state. This means it's
on standby and ready to come up in case of primary failure. Hope this answers
your questions...
Mark Zabludovsky ~ CCNA, CCDA, 1/4-NP
<A HREF="mailto: [EMAIL PROTECTED]">[EMAIL PROTECTED]</A>
"If you need luck, apparently you're not prepared...Go study!"
~Mark Zabludovsky~
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