Cisco Stack incompatible software 3750

Tried to add aWS-C3750V2-24PS-S    to an existing 3750 stack got a message like: "A switch with incompatible software has been added to the stack. Scanning found no software to make all 3 compatible..."

Switch         Ports  Model                     SW Version                        SW Image           

------   -----  -----              ----------              ----------         

*    1   12      WS-C3750G-12S       12.2(25)SEB4            C3750-IPSERVICES-M 

     2   12      WS-C3750G-12S       12.2(25)SEB4             C3750-IPSERVICES-M 

     3   0        WS-C3750-48TS        12.2(25)SEE2             C3750-IPBASEK9-M   

Switch#  Role      Mac Address     Priority     State

--------------------------------------------------------

*1       Master    0015.fa23.2500     1         Ready              

 2       Slave     0015.fa23.3600     1         Ready              

 3       Slave     0018.19b3.6280     15        Version Mismatch

Crypto software causing the problem? or is it IP base vs IPservices?

You can mix and match software types in a stack, but not versions. In my office I have a stack of 6. 2 with IPSERVICES and 4 with IPBASE, but all are running the same SW version.

In your stack 1 and 2 are using 12.2(25)SEB4 and 3 is using 12.2(25)SEE2. These all need to match for the stack WS-C3750X-24P-S     to work correctly.