communication among heterogeneous software versions

[Michael Stone]

On Thu, Dec 25, 2008 at 12:41:37PM -0500, Mikus Grinbergs wrote:
>It's good that these heterogeneous-software-version XOs were able to 
>see each other's "presence".  But being shown two different kinds of 
>information in the output illustrated a potential exposure --
>
>     What if the systems at a given site do *not* all contain the
>     same software version (e.g., from 2008 vs 2009).  Will all those
>     systems be able to correctly collaborate among themselves ?

My experience suggests that the presumption should lie nearer to the
idea that the systems will be incompatible until they are tested as
being compatible than it does today.

>     If not, do deployments need to be cautioned ?

Yes, though gently, since things frequently work just fine. 

Michael