HADB configured with double networks on two subnets works properly on Solaris SPARC. However, due to problems in the operating system or network drivers on some hardware platforms, it has been observed that Solaris x86 and Linux platforms do not always handle double networks properly. This causes the following problems with HADB:
On Linux, some of the HADB processes are blocked when sending messages. This causes HADB node restarts and network partitioning.
On Solaris x86, some problems may arise after a network failure that prevent switching to the other network interface. This does not happen all the time, so it is still better to have two networks than one. These problems are partially solved in Solaris 10.
Trunking is not supported.
HADB does not support double networks on Windows 2003 (ID 5103186).