Well - some additional info is prudent, I think.
You can use the automatic bridging software that comes with Sonar, HOWEVER, sometimes/often (depending on the plugin), 32-bit plugins running through that bridging software, OR commercially available 3rd-party bridging software such as JBridge, will NOT always work in a 64-bit Sonar. This can include seeing minor glitches, all the way up to crashing Sonar. OR, a given 32-bit plugin may well run WONDERFULLY in a 64-bit Sonar.
It really does depend on the coding of the 32-bit plugin, and how it behaves working with the bridging software. Many many folks found early headaches trying to run with bridged 32-plugins too maddening, and those folks (me included), ended up deliberately choosing to try to whenever possible only use 64-bit plugins in 64-bit Sonar environments, WITH a select set of 32-bit plugins manually tested to make sure they worked OK and were stable when running bridged in a 64-bit Sonar.
Many of the commercial plugins have ended up providing 64-bit versions of their 32-bit plugins, many/most times at no additional charge, and for those that are only available as 32-bit. those would get tested to make sure they would continue to work in a bridged environment.
SOOOOO - I would suggest that you do some testing of any and all 32-bit plugins you are contemplating using in a bridged manner in a 64-bit Sonar, and try to find suitable 64-bit versions to replace any that are too unstable (either upgrade or swap out for some 64-bit plug that provides similar sound or functionality).
I hope the above helps - just keep a wary eye on any unstable 32-bit plugs and quit using those that result in quirky or crashy behavior.
Bob Bone