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Distribute a new Internet bandwith link.

Posted on 2013-10-30
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Last Modified: 2013-11-04
Hello Network Experts,

We currently have a 50 MB business dsl. They want to bring in a new internet connection of 100 MB and add 50 MB to the existing one and dedicate the other 50 MB for some other project.  We are using Cisco ASA 5520. Is it possible to separate and dedicate this  new internet bandwidth with this device or a new device is needed  or how can it be achieved?

Please advise,

Thanks,

Deorali
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Question by:Deorali
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rauenpc earned 500 total points
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By default, the ASA as a platform cannot do active load balancing. This means that you cannot utilize two internet connections simultaneously, but rather you can only configure for failover.

However... Using NAT in specific ways will allow you to "load balance", but you will also probably lose the ability to failover traffic. To do the NAT thing, you define two default routes, and then your nat statements need to be specific to the source and destination interface, as well as specific to the inside source IP. I don't believe you can have any overlap in your NAT statements as that would cause traffic to always choose the primary default route and therefore the primary interface.

All things depending it could be a better choice to get two ASA's and use routing/PBR on the inside of the network to perform a type of load balancing.
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