Query about automatic tunneling and ND

Dear Mr. Tony and all

I have two queries . Can you pls give me the details. and tell me about some
usefull document .

Questions:
1.
HOST1 and HOST2 are in different networks and having IPv6 addresses
HOST1 send one tunneled IPV4 packet <Encapsulated IPV6 UDP packet> to the
HOST2
            (Before sending the tunneled packet out, Will the HOST1 send
tunneled mulitcast NS to HOST2 ?<For Reachability Confirmation>)

2.
Is Automatic tunnels always unidirectional or only for following condition
[Neighbor Discovery and Stateless Address Autoconfiguration] ?

P.S: RFC-2893
Automatic tunnels and unidirectional configured tunnels are considered to be
unidirectional. Thus the only aspects of Neighbor

Discovery [7] and Stateless Address Autoconfiguration [5] that apply to
these tunnels is the formation of the link-local address.





Thanks
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
IF U FIND SOME ONE WITHOUT A SMILE,GIVE ONE OF YOUR'S

Anurag Uxa
IWave Embedded systems
Bangalore
ph.6786243/5 extn :210



DISCLAIMER:

This e-mail and any attachment (s) is for authorised use by the intended recipient (s) only. It may contain proprietary material, confidential information and/or be subject to the legal privilege of iWave Systems Technologies Private Limited. If you have received this message in error, please notify the originator immediately. If you are not the intended recipient, you are notified that you are strictly prohibited from retaining, using, copying, alerting or disclosing the content of this message. Thank you for your co-operation. 
--------------------------------------------------------------------
IETF IPng Working Group Mailing List
IPng Home Page:                      http://playground.sun.com/ipng
FTP archive:                      ftp://playground.sun.com/pub/ipng
Direct all administrative requests to [email protected]
--------------------------------------------------------------------