topic Failover with different PIX OS versions in Network Security https://community.cisco.com/t5/network-security/failover-with-different-pix-os-versions/m-p/308499#M592175 <P>Hello,</P><P>is it possible to have a PIX cable failover with a PIX 6.2 and a PIX 6.3?</P><P></P> Fri, 21 Feb 2020 07:26:08 GMT qs_cco 2020-02-21T07:26:08Z Failover with different PIX OS versions https://community.cisco.com/t5/network-security/failover-with-different-pix-os-versions/m-p/308499#M592175 <P>Hello,</P><P>is it possible to have a PIX cable failover with a PIX 6.2 and a PIX 6.3?</P><P></P> Fri, 21 Feb 2020 07:26:08 GMT https://community.cisco.com/t5/network-security/failover-with-different-pix-os-versions/m-p/308499#M592175 qs_cco 2020-02-21T07:26:08Z Re: Failover with different PIX OS versions https://community.cisco.com/t5/network-security/failover-with-different-pix-os-versions/m-p/308500#M592176 <HTML><HEAD></HEAD><BODY><P>I don't believe so. All pix docs that I have read with regards to failover, indicate that both units need to be at the same level of code, probably to make sure that nothing gets misinterpreted across the failover link (meaining the serial, lan, and stateful failover links).</P></BODY></HTML> Wed, 02 Jun 2004 10:40:09 GMT https://community.cisco.com/t5/network-security/failover-with-different-pix-os-versions/m-p/308500#M592176 ehirsel 2004-06-02T10:40:09Z Re: Failover with different PIX OS versions https://community.cisco.com/t5/network-security/failover-with-different-pix-os-versions/m-p/308501#M592177 <HTML><HEAD></HEAD><BODY><P>No is not possible as you can read on the cisco web site </P><P>&lt;&lt; Using a pair of identical PIX devices (model, memory, network interface cards (NICs), operating system versions), high availability can be provided with no operator intervention&gt;&gt;</P><P></P><P>If you use different version there will be some problem with the negotiation and durign the switchover.</P><P></P><P></P><P></P><P></P><P></P><P></P></BODY></HTML> Wed, 02 Jun 2004 10:49:18 GMT https://community.cisco.com/t5/network-security/failover-with-different-pix-os-versions/m-p/308501#M592177 marco78 2004-06-02T10:49:18Z