[MEXT] Issue #17: Multi-homed mobile node can cause routing loop between home agents

["Charles E. Perkins" <charles.perkins at earthlink.net>]

Hello Benjamin,

I have not seen any further discussion about this issue,
but I agree that the problem does exist.

It might be possible to specify that the Home Agent should (or,
?may?) use the RFC 2473 "Tunnel Encapsulation Limit Option".
to help avert the threat.  Otherwise, the loop could persist for
an annoyingly long amount of time.  It is also possible for the
home agent to enforce a policy by which a home address on
a network cannot be bound to a care-of address on the same
network, but in fact there may be cases where that would be
a valid binding.

I hope that other people in the working group will
express an opinion about this.  At minimum, we could
certainly include text within the Security Considerations
section.

The existing discussion is documented at the following URL:
http://trac.tools.ietf.org/wg/mext/trac/ticket/17

Regards,
Charlie P.

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