https://community.extremenetworks.com/t5/extremewireless-identifi/how-is-a-recommended-process-to-migrate-from-a-wireless-c25-ha/m-p/29283#M211 you can upgrade the C25 to V9 and it will have a 7day grace period. With that said, you can export the config and roll the controllers back with the rescue image.<BR /> <BR /> Just set the AP's for a controlled upgrade so that it does not affect the connected clients (unless they are B@EWC<BR /> Wed, 24 Feb 2016 04:32:00 GMT Joseph_Burnswor 2016-02-24T04:32:00Z https://community.extremenetworks.com/t5/extremewireless-identifi/how-is-a-recommended-process-to-migrate-from-a-wireless-c25-ha/m-p/29282#M210 Hi community, <BR /> I want to know how to migrate from a C25 HA pair (V8.32) to a single V2110 (V9.21) seamlessly or by minimal interrupts for Wireless services.<BR /> Which minimum firmware at C25 is required to migrate the configuration to V2110 V9.21 firmware ?<BR /> <BR /> Thank you in advance. Thu, 18 Feb 2016 20:12:00 GMT https://community.extremenetworks.com/t5/extremewireless-identifi/how-is-a-recommended-process-to-migrate-from-a-wireless-c25-ha/m-p/29282#M210 Marcus_Mathuni_ 2016-02-18T20:12:00Z https://community.extremenetworks.com/t5/extremewireless-identifi/how-is-a-recommended-process-to-migrate-from-a-wireless-c25-ha/m-p/29283#M211 you can upgrade the C25 to V9 and it will have a 7day grace period. With that said, you can export the config and roll the controllers back with the rescue image.<BR /> <BR /> Just set the AP's for a controlled upgrade so that it does not affect the connected clients (unless they are B@EWC<BR /> Wed, 24 Feb 2016 04:32:00 GMT https://community.extremenetworks.com/t5/extremewireless-identifi/how-is-a-recommended-process-to-migrate-from-a-wireless-c25-ha/m-p/29283#M211 Joseph_Burnswor 2016-02-24T04:32:00Z