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<DIV><FONT face="Arial Unicode MS" color=#000080>Dear Umair,</FONT></DIV>
<DIV><FONT face="Arial Unicode MS" color=#000080></FONT> </DIV>
<DIV><FONT face="Arial Unicode MS" color=#000080>For roaming using a fixed
IP on WiMax with systems that are in service now, one should use
the MobileIPv4 standard which involves 3 nodes: Mobile Client, Foreign Agent and
Home Agent. The Foreign Agent is normally part of the WiMax ASN Gateway, and
many WiMax ISPs are providing this service already. On IPv6, mobility has a
different architecture and it does not need the Foreign Agent. IPv6
implementation is quite late for fixed networks, and even more late
for mobile networks.</FONT></DIV>
<DIV><FONT face="Arial Unicode MS" color=#000080></FONT> </DIV>
<DIV><FONT face="Arial Unicode MS" color=#000080>An excellent tutorial that
covers important aspects of IPv6, including mobility, is at: <A
href="http://www.6deploy.eu/e-learning/english/index.php">http://www.6deploy.eu/e-learning/english/index.php</A> </FONT></DIV>
<DIV><FONT face="Arial Unicode MS" color=#000080></FONT> </DIV>
<DIV><FONT face="Arial Unicode MS" color=#000080>As for LISP, which is a draft
IETF protocol, I think it is trying to solve the issue of IPv4 routing table
growth with the shortage of IPv4 addresses and numerous /24 IPv4 address
assignments that lead to routing issues. IPv6 is designed for mobility and
simpler routing tables, has a practically infinite pool of addresses, and
should be able to work well in mobile setups with its current protocol
definition.</FONT></DIV>
<DIV><FONT face="Arial Unicode MS" color=#000080></FONT> </DIV>
<DIV><FONT face="Arial Unicode MS" color=#000080>That said, I am glad to see
Hesham Soliman's contribution on this topic as he is an authority on
Mobile IPv6 and has written a book on the subject, check it out on
Amazon.</FONT></DIV>
<DIV><FONT face="Arial Unicode MS" color=#000080></FONT> </DIV>
<DIV><FONT face="Arial Unicode MS" color=#000080>Regards,</FONT></DIV>
<DIV><FONT face="Arial Unicode MS" color=#000080>-Ahmed</FONT></DIV>
<DIV><FONT face="Arial Unicode MS" color=#000080></FONT> </DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=umairbinmansoor@hotmail.com
href="mailto:umairbinmansoor@hotmail.com">Umair Mansoor</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=menog@menog.net
href="mailto:menog@menog.net">menog@menog.net</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Thursday, March 11, 2010 10:25
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [menog] IPv6 routing</DIV>
<DIV><BR></DIV><BR>Dear,<BR><BR>Since the wireless revolution took place,
there has been a lot of active research in the area. As a somewhat distant
observer of the new research going particularly in IPv6 and IP routing in
general, I am curious to know how the routing issue for a roaming,
<B>fixed</B> IP (WiMax/3G) client would be addressed. Would it not affect the
hierarchical structure of IPv6? Among the prospective solution (that I have
come across so far), apart from VPN, would be <B>Locator Identifier Separation
Protocol (LISP)</B>. Kindly comment on this...<BR><BR>Regards,<BR>Umair bin
Mansoor <BR>
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