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Failover options


Our company just recently acquired a 9mbps internet connection for redundancy in case our main ISP connection fails.

Equipement involved:

We currently have a PIX 515 connected to our main internet connection that is a 7 T1 Bundle. I am looking foward to replace this with a ASA 5540.

The branch offices currently run a pix 501 which i am planning to replace with a ASA5505.


I have 9 branch offices distributed accross Canada, they are all small offices with less than 20 individuals in each location, they run of a PIX 501 with one IPSEC tunnel to our main PIX 515 in the main office.

Desired Scenario:


We need fail over regardless. My company is maturing its business and downtime is becoming a critical situation that we cannot afford.

Question: I Would like to know how can i failover the ASA5540 with two internet connections. I have a ASA5505 in hands and i was reading the manual and i can see that it can do that, so my best guess is that the 5540 would be able as well.

Simply, my two isp providers are completely independent of each other, so even if the circuits of the main one fail, the second one do not have anything with the first and will still work, so i would like the ASA tp failover if that happends and just start using the second link.

Any thoughts ? No config files for now :D
Just simple talk.
2 Solutions
A good starter doc on the whole subject here: http://www.oreillynet.com/pub/a/network/2002/08/12/multihoming.html

Yes, you can setup the ASA for failover using dual ISP's and it is quite simple. The only thing you can't do is load-balance or even use route-maps to load share.
I know you said that you didn't need configs for now, but here's the document that describes the solution and also how to configure it:


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