From: Fred (fd200@xxxxxxxxxxxxxxxx)
Date: Thu May 04 2000 - 22:46:47 GMT-3
Kinton,
I'll try your to make it into stub area as well as filter out the
redistribution traffic to see if it works. Thanks
Also, the snapshot on lab7, the lab require to configure snapshot and
also test out the backup using ISDN line when the serial line is down.
Correct me if I am wrong, it is not possible to configure snapshot on
the ISDN line as well as using it as the backup line (using backup
command on the serial line) at the same time, right? I noticed that if
backup line is in standby mode, even if there is an interesting packet
that permit to trigger the line to go up, the ISDN will still stay
down. I have been fighting with snapshot and backup for the whole day.
Fred
Kinton Connelly wrote:
>
> Fred, I've had a lot of problems getting ospf demand-circuit to work
> especially with CCIE Boot Camp's lab 8 with the way they have the ISDN
> interfaces in area 0. Even when I set up my configs to match theirs, the
> ISDN connection would never stay down.
>
> Here's what I saw with debugs: the ISDN connection (with demand-circuit)
> would come up because of ip traffic to 224.0.0.5 (ospf). The connection
> would time out at 120 seconds and the line would drop. But when the line
> dropped, OSPF would generate an LSA (don't know what kind) and that LSA
> would be flooded out the ISDN interface, bringing it up. This nasty circle
> would go on and on.
>
> What I did to get it to work was put the ISDN interfaces in their own area
> and make it a stub area. After that, demand-circuit worked as advertised.
>
> So maybe that's what they need to do - make sure the interfaces are in
> their own stub areas.
>
> Maybe someone on the list can better explain the exact mechanics of ospf
> demand-circuit - all I know is that without the stub area, the line goes up
> and down forever - with the stub area, it works as advertised.
>
> Kinton
>
> At 5/3/00, you wrote:
> >Guys,
> >
> >For those who did the cciebootcamp lab5b, regarding the DDR in a
> >difference area other than the backbone. They claim they haven't figure
> >out what was the problem with it, so I am just wonder if any of you
> >figure that out already. Thanks
> >
> >Fred
> >
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