With the release of vCloud Director 5.1 and vShield 5.1, the Knowledge Management Team here at VMware has been busy creating useful articles for these products. You may want to review them just to become familiar with the upgrade process as well as any issues that may arise:

• Installing vCloud Director 5.1 best practices (2034092)
• Upgrading to vCloud Director 5.1 best practices (2034980)
• Installing vShield 5.1 best practices (2034173)
• Upgrading to vShield 5.1 best practices (2034699)
• Network port requirements for vCloud Director 5.1 (2034426)
• Supported web browsers in vCloud Director 5.1 (2034554)
• Installing and configuring a vCloud Director 5.1 database (2034540)
• Supported guest operating systems in vCloud Director 5.1 (2034491)
• Accessing and using the vShield 5.1 REST API (2034410)
• Hardening vShield 5.1 virtual appliances (2034358)
• Upgrade paths from vSphere editions to VMware vCloud Suite 5.1 (2032390)
• Cannot upload the upgrade bundle while upgrading from vShield Manager 5.0 to 5.1 (2034804)
• Stopping a vApp in vCloud Director fails with the error: InternalServerErrorException: Failed to purge object (2034802)
• VXLAN support in vShield Manager (2034749)
• Duplicate packets or packet loss when using using LACP (2034807)
• Audit logging of vShield Edge does not work correctly in vShield Manager 5.1 (2034801)
• Unable to remove a host from the vCenter Server inventory belonging to a VXLAN prepared cluster (2034808)
• After upgrading to vSphere 5.1 vShield Endpoint stops functioning (2031655)