3Com VCX V7000 Maintenance Manual page 327

Downgrading from 7.0 to 6.0 327
./S70tomcat start
14 Log in as root to the regional Authentication and Directory server
associated with the branch and enter the following commands to start
the globaldir service:
cd /opt/3com/VCX/scripts/rc3.d
./S30vcxglobaldir start
At this point, because there is a version mismatch between the branch
database and the regional database, you cannot access branch data
through provisioning at the region. You must use the provisioning
interface on the branch server.