Hello folks,
> > There is a portion of mobility -- I believe that is is called the
> > "correspondent node option", or something like that -- that must be
> > implemented in all IPv6 hosts, in order to allow optimal routing
> > to mobile nodes that are away from their home networks.
> > This document
> > should indicate that support for that feature is required.
>
> => Within the current MIPv6 spec, this CN portion is
> nothing. I.e. nothing to add to a standard IPv6
> host.
That is under discussion. In fact, I strongly believe that EVERY
IPv6 correspondent node MUST implement return routability procedures.
Furthermore, every IPv6 node already MUST implement Home Address Option.
Here is the current text:
========================================================================
8.1. Requirements for All IPv6 Hosts and Routers
Since any IPv6 node may at any time be a correspondent node of a
mobile node, either sending a packet to a mobile node or receiving a
packet from a mobile node, the following requirements apply to ALL
IPv6 nodes (whether host or router, whether mobile or stationary):
- Every IPv6 node MUST be able to process a Home Address option
received in any IPv6 packet.
- Every IPv6 node SHOULD be able to participate in a return
routability procedure, process Binding Update messages, and to
return a Binding Acknowledgement option if the Acknowledge (A)
bit is set in the received Binding Update.
- Every IPv6 node SHOULD be able to maintain a Binding Cache of the
bindings received in accepted Binding Updates.
========================================================================
Furthermore, even if those SHOULDs remain SHOULDs (a mistake, in
my opinion), a _cellular_ host is a case where it MUST be a MUST.
Such nodes are even more likely than generic IPv6 nodes to be
maintaining communications with mobile nodes -- for instance with
VoIP.
Regards,
Charlie P.
--------------------------------------------------------------------
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]
--------------------------------------------------------------------
