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Alternative to buying and implementing a third Cisco ASA for failover.

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Last Modified: 2012-05-10
Hi,
We are currently looking at implementing a PIX to ASA upgrade on our network. There are two ISL's in place (alternate provider) and will connect to the new ASA's individually. We also require a failover mechanism between both firwalls and an active connection from both to the
our DR site. The option currently being looked at is to implement a third ASA. The DR site is firewalled and if third ASA is not put in place there will only be a link from the DR site to one local firewall. This will not satifsfy failover requirements as if the firewall linked to DR goes down, how will fail over take place? Are there other options available apart from third firewall, hardware must be cisco. Thanks in advance.
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