System error whlie using PM583 ETH redundant configuration with cm597

Hello Everyone,

In My System i am using PM583 ETH redundant configuration With CM597 as a ethernet coupler for both CPU A and CPU B, and i have a two ethernet switches for network redundency. i have used onboard ETH ports for UDP data exchange with crossover cable, i have connected one cable from ETH1 port of CPU A Coupler to Switch1 and another cable from ETH1 port of CPU B coupler to switch 2 , third cable from ETH2 port of CPU A Coupler to switch 2, fourth cable from ETH2 port CPU B Coupler to switch1(please fid attached picture reference).

When i Attach Third or Fourth cable to ETH2 PORT of CPU A or ETH2 PORT Of CPU B coupler(cm597), the both cpu are suddenly going to stop mode, and i am getting following errors

Error 1: E2 003 , D1 009,D2 001, D3 031,D4 001.
Error 2:E4 054, D1 011,D2 009, D3 031,D4 031.
Error 3:E4 020, D1 009 ,D2 000, D3 002, D4 002.
Error 4:E4 007, D1 011, D2 003,D3 001, D4 003.

IP Adresses of CPU A is 172.16.4.152 and its coupler cm597 adresses is 172.16.4.154.
IP Adresses of CPU B is 172.16.4.156 and its coupler cm597 adresses is 172.16.4.158.

please help me to resolve this problem and suggest me that how we can assign two different ip address to plc's like 172.16.4.20 & 172.20.4.12 on redundant configuration.