Filters for Mobile IP Bindings (NOMAD) draft-nomad-mobileip-filters-05 N. A. Fikouras, A. Udugama, K. Kuladinithi and C. Görg University of Bremen, Germany W. Zirwas ICM, Siemens AG, Munich presented by Carsten Bormann University of Bremen, Germany

 Better utilization of available network resources! Motivation “Simultaneous use of multiple points of attachment on a single Mobile Device” Mobile IPv4 : - Simultaneous bindings (S bit), duplicates traffic - If duplication is unwanted, only one PoA can be active at any given time - One hand-off affects all flows - Not enough IP addresses for multi-homing Filters for Mobile IP Bindings (NOMAD): - Simultaneous use of multiple PoAs with a single Home IP address without duplicating traffic - Distribution of Multiple Flows - Distribution of a Single Flow - Flow Rejection Applications: - Load balancing - Network management (flow management initiated by core network) - Enhanced terminal mobility (partial hand-offs, smoothed hand-offs)  Better utilization of available network resources!

Mode of Operation Multiple Flow Distribution Single Flow Distribution Reg. Reg. Reg. Filter FC Filter Proto=udp & Proto=udp & Port=5000 Weight=20 Port=5000 Weight=80 Index=1 Weight=0 Index=1 Index=1 Multiple Flow Distribution Single Flow Distribution Flow Rejection

Filtering Request

Dynamic Format Filters Nine Types of Filter Modules DSCP / Flow Label , Traffic Class Source Address, Source Network Source/Destination Port Number/Number Range Protocol Number Free form, specifies the value of an area anywhere within the packet OR between Filter Module Predicates (src port == 500 || src port == 600) AND between Filter Modules (proto == udp && src port == 500) Only one Filter may be applicable

Conclusions Simultaneous use of multiple PoA with a single Home IP address Dynamic Filter Format definition Distribution of Multiple Flows (different criteria) Distribution of a Single Flow (shared criteria) Flow Rejection