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Does anyone know if it is possible to aggregate lets say 5 ADSL lines but using IPsec for tunneling and use it as one big line, also as a mean to redundancy in case one of the ADSL's break. Maybe there is a piece of hardware that can be used for this? How would routing need to look in this case?
I have a nettopia router at one of my branch sites that takes two 1.5mb SDSL lines and then uses DSL bonding (IMUX) to reach speeds of 3.0mb.
http://www.netopia.com/equipment/pdf/spec/d7000.pdf
It looks as if there are devices out there that will loadbalance up to 3 ADSL lines. http://linuxdevices.com/articles/AT3089542120.html
I'm sure if you keep searching you'll find what you're looking for.
If you want to multiplex several DSL lines, you'd need a DSLAM. It ain't cheap. It might be better to just run a fiber line instead.
Thanks for the suggestions but is it possible to do IPsec tunnel balancing. I have juniper SSG20 firewall/router and i terminate a tunnel on my juniper M7i router.