multiple network interfaces

[Rick Porter]

I would like to use clustering in a system that has two network interfaces on each host (for network fault tolerance). The documentation states:

> Multiple network interfaces for data nodes are not supported. Use of these is liable to cause problems
> because, in the event of a data node failure, an SQL node waits for confirmation that the data node
> went down but never receives it since another route to that data node remains open. This can
> effectively make the cluster inoperable.

I don't understand this explanation. How can there be a 'route open' to a dead node? And is the 'confirmation that the node went down' simply the loss of the TCP connection or something else?

Can someone please:
a) explain this better, and
b) tell me if there is any kind of workaround

Thanks,

Rick