In our system we have two servers and two engineer stations and 6 operator stations the servers and engineering stations communicate with 9 S7-400 through CP1623 .

We thought about the MAC address of CP1623 we modified it but the same display is obtained and when we ping the address of one of the PLCs it ping but no data (for the leds of the CP card the green is lit continuously and the yellow flashes but slowly not like the card of the second server).

see attachment

I found what i have to do. For information i followed this link (https://support.industry.siemens.com/cs/document/109743154/what-should-you-watch-out-for-when-configuring-a-cp-1613-cp-1623-?dti=0&lc=en-CH)

Best regards