What if another ISAKMP sa is being negotiated for two peers?

["=?GB2312?Q?=B6=AD=CF=FE=BB=A2?=" <dongcat@csnet1.cs.tsinghua.edu.cn>]

Hi:
	Consider below situation:
	There is an ISAKMP SA between peer A and peer B. Peer A has two interface to which two 
ip address, say A1 and A2, are binded. But peer B doesn't know A2 belongs to peer A. 
	Now peer B wants to communicate with the host with address A2 securely. He initiates a 
negotiation with phase one's first msg des. 
	How does peer A act when he receives this initial msg? 



Dong Xiaohu
Tsinghua University, Beijing, China
dongcat@csnet1.cs.tsinghua.edu.cn