[Openswan Users] Does Openswan support tunnel over virtual ethernet?

[Timmy]

Dear Paul and other Openswan 2.6.38 users,

My question is:
Does Openswan 2.6.38 support tunnel over a virtual ethernet adapter?  In 
symbol, it is:
eth0:1 with an assigned public IP, for example, 1.2.3.4.

My openswan set up works very well whenever I log in by the primary 
public IP of my server.  In symbol, it is eth0.

However, whenever I log in by the public IP corresponding to eth0:1, it 
never connects.

Strongswan claims that it can handle virtual Ip but I can never make it 
works.