We have a Remote location connected with Primary Leased line(Point to Point Link)and also a ISDN backup link for primary. Both the links are configured in OSPF network. Now my problem is whenever I making ISDN link up even though Primary link is up for load sharing purpose, load sharing is not happening. I verified the cost of the both links and found the same. And both are in the same Area. Can somebody help me out??????
I guess when you say Load Sharing, you mean to say during the times of congestion, you want to take the extra load using the ISDN BRI.
If I'm correct, then I guess first you should check is the SRTT on both the links individually and if the difference between them is too high, then its really difficult to achieve what you are trying to achieve.
As if a data stream is divided across the links there would be increased jitter on the stream and OSPF will not use the same for load balancing (or load sharing).
I think that it would help if we knew some details of your environment. Is the ISDN configured as OSPF demand circuit or some other way? Does the leased line configure the ISDN as backup interface? To clarify can you provide the config?
Also I assume that the leased line and the ISDN originate on the same router. Do they also terminate on a single router or does leased line terminate on one and ISDN on another? Can you clarify this?
ISDN is configured as Point to Multipoint network. And it is used for backup for leased line.And also both are terminated in the same router. Actaully we want to use this ISDN for load-sharing purpose whenever leased line bandwidth is fully loaded.
Could you please provide the config. and the bandwidth of the LL ?
You are looking for something like bandwidth on-demand routing. As I know, only the multilink PPP can do it by triggered by the link load and setup another channel. In this case, I believe it can't do it.
You may need to manual redirect some traffic to the ISDN, e.g. policy-based routing or setup static route for the traffic to pass through ISDN.
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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