Update 2 for Citrix XenServer 5.5 resolves a number of functional and stability issues that were present in the XenServer 5.5 release, so it is recommended that all customers install this update, including customers with XenServer 5.5, Update 1 installed.
This update resolves the network connectivity issues that affected customers with both IPv4 and IPv6 network interfaces enabled who installed Update 1. This issue is described in XenServer 5.5 Update 1 Upgrade Causes Virtual Machines to Lose Network Connectivity.
Additional Changes in Update 2
- Addressed an issue where the system was falsely reporting lost access to the HA metadata disk.
- Fixed issues upgrading from XenServer 5.0 to the roll-up ISO for XenServer 5.5.
In addition, the XenServer 5.5 documentation was rereleased to coincide with Update 2. While the changes in the documentation are not significant, there are some differences between XenServer 5.5 and XenServer 5.5, Update 2.