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Can I configure failover between two FWSMs that run different versions of code?

April 26, 2017code configure different failover fwsms run versions

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Can I configure failover between two FWSMs that run different versions of code?

2 Answers

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A. No. Failover requires that both FWSMs run the same version of code. A mechanism within the failover feature verifies the peer version and prevents failover if the versions of code are different. For this reason, you must upgrade both FWSMs at the same time.

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A. Yes but! Failover requires that both FWSMs run the same major version of code. This means you can run failover between 2.3(1) and 2.3(4), but not between 2.2(1) and 2.3(1) or between 2.3(4) and 3.1(1).