Any exspert can help ! I have installed a router that successfully backup a serial (lease line) with BRI when the l.line failure. But I can't make it work for backup load. Can it be I using the same IP address for both serial and dialer interfaces. Please advise. My routers IOS is using 12.1(12) IP Plus and my router configuration as following,
Almost certainly that is your problem. If you have ever accidentally tried to assing overlapping address space to an interface, you know that the IOS barks. For good reason. Can't have the same IP assigned to two active interfaces. Try adding loopback 1 and assigning a different address.
Hi, thanks for your response. The following was my static routing configuration.
ip route 0.0.0.0 0.0.0.0 Serial0/0
ip route 0.0.0.0 0.0.0.0 Dialer1 120
ip route 188.8.131.52 255.255.255.128 Serial0/0 (remote loopback0 subnet)
ip route 184.108.40.206 255.255.255.128 Dialer1 120 (new one should be ip route 220.127.116.11 255.255.255.252 Dialer1 120)
dialer-list 1 protocol ip permit
How should I configure for the static routing configuration? It is similar to above and eventually it will be automatic load balance over two path (same cost)? Can I configure multilink PPP to bundle ISDN and Serial for above senario? My understanding is either all serial link or ISDN link.
I'm not 100% sure that I follow your question so forgive me if my answer is way off. First of all, you pose and interesting question about ppp multilink. I can't ever remember seeing an application where different media were used but on the other hand I'm not sure why it would matter. However, if you are looking to just bring up the ISDN when a certain load is exceeded, you can do that without multilink.
Also, as for your static routes, I'm not sure what your intent is. You appear to be adding specific routes for your loopback addresses. That really isn't necessary (since you have a default defined) but there is nothing to stop you. For that matter, you could have both routes to your loopback addresses.
Thanks. Just to inform I had make it successully eventually using two different IP addresses for serial and dialer. In order to used the ISDN link (load balance), I used eigrp and configured to be same metric for both link. Thank you.
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