I need to replace our Primary PIX 525 and have not be able to find any documentation regarding how to do this. Has anyone here ever done thins and if so can they either give me a few suggestions on the best way to go about replacing the PIX or point me to the correct documents?
You should be able to do this fairly easily. Power the primary down and the standby should be active. Make sure your new pix has the same code of PIXOS and the same ASDM/PDM if you are using it and then configure the new pix as you would a secondary pix, see this link -