From: beda jain (bpjain@xxxxxxxxx)
Date: Mon Jul 22 2002 - 16:24:01 GMT-3
Hi,
I think only ip ospf demand circuit will be the answer.
You don't need dialer watch.
When ever there is a change in topology it will bring the link up and then
after idle time out the link will
go down. Because hello packet are suppressed in demand circuit.
Let me if i am wrong.
Thanks,
Beda
At 06:22 AM 7/22/2002 -0700, ying c wrote:
>Hi,
>
>Below is queston 16 from ECP1's final exam which I
>could not come up with any answer:
>
>"Configure dial backup so that R2 calls R1 when routes
>learned over the Frame-Relay interface disappear. Do
>not use the backup interface command. Make sure the
>ISDN link does not stay up indefinitely. (Include the
>backup link in OSPF area 33)."
>
>The general requirement for this exam is no static
>route unless noted otherwise, which means I cannot use
>the floating static. That makes me to think the only
>option I have is to use dialer watch, but that will
>make the ISDN staying up until Frame-Relay network
>comes back up. Don't bother ip ospf demand-circuit
>with dialer watch, as when dialer idle-timeout
>expires, it will check the routing table and keep the
>line up.
>
>Other than backup, floating static and dialer watch,
>is there other way to solve this problem?
>
>By the way, please include me in the copy list when
>you send your reply, as I'm having troubles to receive
>groupstudy emails recently.
>
>Thanks,
>Chang
>
>
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