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Failover Setup Cisco 1841

I have two networks, each with their own firewall connected to a T1.  They also have a point to point connection between them behind the firewall.  How can I make a failover connection?  If Site A's T1 goes down, it will automatically route to Site B's T1.  I am almost there, but the problem I am having is if I disconnect Site A's T1(outside interface of the firewall), the interface on the router stays up and won't failover cause it is connected to the firewall's inside interface.  Any ideas?
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oahuoahu
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oahuoahu
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lrmooreCommented:
What kind of firewall? What routing protocols does it support?
What have you tried? You can use SLA's to ping the T1's IP address and if it stops pinging the route will change.
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oahuoahuAuthor Commented:
It is a symantec gateway 5400 that doesn't support routing protocols.  My version of the Cisco IOS (12.3 (8r)T8 does not have the sla command.
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lrmooreCommented:
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oahuoahuAuthor Commented:
I beleive that I need to upgrade my IOS to the advanced IP services license.  Does anyone know how much and where I can get this?
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lrmooreCommented:
List price is steep. www.cdw.com can usually sell to you.

S184AISK9-12415T  Cisco 1841 IOS ADVANCED IP SERVICES  D  USD 1,400.00  

Enterprise Base supports SLA monitor a lot cheaper, depending on what other features you have enabled (voice, security, etc)
S184EBK9-12415T  Cisco 1841 IOS ENTERPRISE BASE  D  USD 400.00  

Special Services would be another option
S184SPSK9-12415T  Cisco 1841 IOS SP SERVICES  D  USD 600.00  
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oahuoahuAuthor Commented:
Thanks for your help
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