When you upgrade to TeamForge 8.1 on RHEL/CentOS 7.x, you can have Black Duck Code Sight on a separate RHEL/CentOS 6.6 server. Choose the instructions that fit your case.
TeamForge 8.1 supports RHEL/CentOS 7.1. However, it also supports RHEL/CentOS 6.6 if you choose to upgrade on the same server that runs RHEL/CentOS 6.6.