111 © 2001, Cisco Systems, Inc. All rights reserved. Presentation_ID Mobile IPv4 Dynamic Home Agent Assignment Framework (draft-kulkarni-mobileip-dynamic-assignment-02.txt) 58 th IETF Minneapolis – 11/10/2003 Milind Kulkarni Alpesh Patel Kent Leung

222 Status Version 02 published Mobile IPv4 Dynamic Home Agent Assignment Framework draft-kulkarni-mobileip-dynamic-assignment-02.txt Major changes from Version 01 Active interest from vendors At least 2 working implementations

333 Resolved Issues/Changes in version 02 Terminology & Editorial Loop free routing of RRQ Load balancing by rejecting RRQ with special code and suggesting an HA Security considerations Each issue discussed in following slides...

444 Terminology & Editorial Requested/Assigned HA Denote a single HA. Indicates the meaning depending on the message type. Redirected HA New HA that is being referred to for load balancing, administrative policies etc. when the Reply message carries a special error code (TBD by IANA) Changed text to take care of “Outside the scope” as in version 01.

555 Loop free routing No HA redirection in network (as in version 01) HA receiving RRQ (Assigned HA) may reject the request and point to a Redirected HA Since HA does not forward RRQ in network, no chance of same RRQ looping in the network

666 Load Balancing Requested HA can suggest an alternate HA to use by rejecting with special error code and Redirected HA address in extension If special error code is present, the extension carrying Redirected HA address MUST be present

777 Security considerations Since there is no redirection in network, FA receives RRP from the HA it forwarded the RRQ (no address mismatch) Statement that “MN and all HAs may share same SA” removed MN and HA can derive dynamic security association

888 Open Issues In extension carrying Redirected HA address, include public and private HA IP address (if available) Would like to get feedback on this

999 Q & A