performing upgrade on clusters part of SRM.

Hi Everyone,

         We are planning to upgrade our ESXi,5.0.0,1311175 to ESXi5.5 ,1746018 but that Cluster is part of SRM. Do  we need to take any due diligence while performing upgrade on clusters part of SRM ? Please advise what caution need to take since its prod environment and SRM also configured. Thanks

thanks

vm2014