Cognos 10.1 GW(Web Tier) connecting to 10.2 CM on a different server

[nishanth]

We are upgrading Cognos Server from 10.1 to 10.2.1 , there is a store portal server on which Cognos GW(Web Tier) is installed which cannot be upgraded now. Can a Cognos GW (running on 10.1) connect to Cognos Dispatcher/CM running on 10.2.1 on a different server ?? Would the Cognos components(GW,CM) need to be on the same version level ? Can some please clarify ? Any help around this is much appreciated.

[bdbits]

Mixing different versions of Cognos components is generally not supported. They should always all be on the same version.

[sdf]

Why not just have another server for a web tier for the mean time while the original server is not yet ready for upgrade. You can always repoint to the original GW once done with upgrade.