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Downgrading a BMXCRA31210 firmware with less than v2.18 can cause some Ethernet ports not to function

Issue
This Resolution describes why there is a minimum firmware version of 2.18 for a BMXCRA31210 at a PV07.
Some Ethernet ports of a BMXCRA31210, at a PV07 or higher, will not function if the firmware is downgraded to any version less than 2.18

Product Line
BMXCRA31210 PV07

Resolution

Firmware version 2.18 was created to operate with the new PV07 module and is compatible with previous PV versions.
Firmware version 2.18 has the exact same functionality as version 2.16. There are no fixes and no improvements. The requirement for firmware version 2.18 was due to a component change in PV07 and higher modules.
BMXCRA31210 modules at PV07 are not compatible with firmware versions less than 2.18.