Subject: [mobile-ip] about hierarchical foreign agents (reg-tunnel-06.txt)

From: "Wayne Ying-Jui Lee" <[email-masked]>
Date: Tue, 7 May 2002 17:36:06 +0800

Hello,

    I read "Mobile IPv4 Regional Registration" (reg-tunnel-06)
In appendix B, it's mentioned multiple hierarchy levels of FAs
beneath the GFA level. However, as described in that, the FA
MUST support smooth handover (specifically, the Previous
FA Notification extension). It seems the extension of Route 
Optimization is needed. So, I should need to modify original
CN to support RO, and then suit  multiple levels of FAs??

Is it possible I use multiple levels of FAs without Previous 
FA Notification extension? Or, any other solutions? 

Thank you.

Sincerely,
--
Wayne Ying-Jui Lee