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SNAT on Cisco Routers

Posted on 2011-03-17
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Last Modified: 2012-05-11


Site1---------------------Site2
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R1-------------------------R2
First of all apologize as my drawing skills are not that good.


All right situation I have here is that, I R1 and R2 are running HSRP  (2 groups one active per router) with SNAT on them. We have several sites connecting to Site1 and Site2 in the same fashion.
Whenever there is a failure most of the time R1 and R2 SNAT tables are not synchronized and clients sitting  behind loose that particular connection.
Due to critical nature of the application it’s a big upset to loose a connection and re-establish it through other router.

We have tried several routers/ios models however situation is same.
Just want to know is there any better way around to it specially with ASA.
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Question by:tech2010
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by:tech2010
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just to add one more thing its two way snat..
secondly multiple security contexts on cisco ASA could be a good solution to that ?
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by:lrmoore
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ASA in Active/Standby pair with stateful failover enabled may be just the ticket.
Not sure about multiple contexts though, you lose a lot of functionality.
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by:tech2010
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problem is i have to keep both sides up so is it possible with Active/Active.
Why are you suggesting Active/Standby.

I want to use both gateways for load balance and want and two way SNAT synchronization.
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lrmoore earned 500 total points
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Active/Active could work well for you also, in multiple context mode. Check the caveats here:
http://www.cisco.com/en/US/products/ps6120/products_configuration_example09186a0080834058.shtml#statef

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