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what is the best way to migrate from Cisco ASA 5520 "ASA version 8.2(1)" firewall to 5525x, iv'e tried to copy the running-config through the CLI and it went horribly " because of the deference in the NAT config and the VPN crypto maps. please advise. regards

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    What version are you running on the 5525x? – Ron Trunk Nov 12 '15 at 13:42
  • @RonTrunk 5525x minimum code version is 8.6, so I am imaging this is a question surrounding the NAT changes in 8.3+. – Eddie Nov 12 '15 at 16:42
  • One way would be to copy the startup-config from the 5520 to the 5525x and reload it. It should run the conversion process, but don't expect to do a good job of it. – Ricky Beam Nov 12 '15 at 20:52
  • Did any answer help you? if so, you should accept the answer so that the question doesn't keep popping up forever, looking for an answer. Alternatively, you could provide and accept your own answer. – Ron Maupin Aug 12 '17 at 21:36
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Cisco has a guide for migrating your ASA configuration file: Cisco ASA 5500 Migration to Version 8.3

There are also online migration tools which you can find with a quick Google search. I haven't used any so I have no opinion of thm.

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