PRP is abbreviation of Parallel Redundancy Protocol and supported in Easergy P3 when the double port Ethernet communication board is available. For details of PRP, please download the application note P3_EN_AN_A004. WEB link:
https://www.se.com/ww/en/download/document/P3_EN_AN_xxxx/
https://www.se.com/ww/en/download/document/P3_EN_AN_xxxx/