I have a S8710 with duplicated IPSIs (Rel R013x.00.0.340.3). The IPSI in carrier B is always in standby no matter which server is active. If I busyout IPSI 01a the stack goes down. It never switches to IPSI 01b. I attempted to test IPSI 1b and I got an error message that said 'invalid carrier location for an ip-server interface. When I added the IPSI I did select the seconday IPSI option. Any ideas.