I had a similar problem where if the primary link to the primary router went
down, the ISDN backup link to the secondary router would take over as
expected. But when the primary link came back up, the static route over the
ISDN link did not get removed. A 'clear ip route' would fix this. One work
around was to change the bandwidth and delay parameters on the ISDN
interface which made the static route have a higher AD. Or under eigrp
where you do your redistribute static command, add the optional parameters
where you can set BW, delay, load,... In the end, I wound up using Dialer
Watch instead of floating static routes. (But I still had to change the
delay variable on the remote router's Dialer interface) Hope this was
useful.
Mike
"Jim Bond" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Hello,
>
> We have 4000 router and 5200 router at central office,
> 2500 routers and 3640 routers at branch office. 4000
> and 2500s are connected with frame relay, 5200 and
> 3640s are connected with ISDN backup. Eigrp is the
> only protocol. We have a default route from 4000 and
> it got advertised on 2500s and 3640s as AD /170. We
> also configure a default route on 3640s with AD /200
> so in case frame is down, /200 default route will take
> over and then can bring up ISDN.
>
> The problem is sometimes when frame is ok, 3640 router
> default route changes to AD /200 and hence brings up
> ISDN backup (3640 also serves as RAS server). When I
> do "clear ip route", the AD /170 default route will
> come back again, then some days later, it'll get
> replaced by the AD /200 one.
>
> We use the same IOS on all routers but this only
> happened on some branch offices, not all of them. Any
> idea what wrong it is?
>
> Thanks in advance.
>
>
> Jim
>
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