1. 59 th IETF – NEMO Working Group 1 NEMO Multi-homing Issues Prepared for 59 th IETF NEMO WG By Chan-Wah NG, Eun-Kyoung PAIK, Thierry ERNST, Julien CHARBON 2004 03 01 draft-ng-nemo-multihoming-issues-03.txt

2. 59 th IETF – NEMO Working Group 2 Change-Log  Changes to draft-ng-nemo-multihoming-issues  merged in draft-paik-nemo-multihoming-problem  moved alternatives classifications to appendix  based benefits/goals from draft-multihoming- generic-goals-and-benefits-00.txt  title change to “Analysis of Multihoming in Network Mobility Support”

3. 59 th IETF – NEMO Working Group 3 Contents (1)  Sect 1: Introduction  Important thing is the objective: To identify which multihoming configurations are useful To capture issues for deploying a multihomed mobile network –Assuming NEMO Basic Support solution is used

4. 59 th IETF – NEMO Working Group 4 Contents (2)  Sect 2: Classification  The usual (x,y,z) classification x = number of MRs where x=1 implies a single mobile router with multiple interfaces and x=N implies multiple mobile routers y = number of home-agent z = number of NEMO-Prefix announced to the MNNs  Important point is to identify the useful classifications  We will return to this when we talk about Section 5

5. 59 th IETF – NEMO Working Group 5 Contents (3)  Sect 3: Benefits & Goals of Multihoming in NEMO  Give deployment scenarios of each of five goals/benefits identified in draft-multihoming- generic-goals-and-benefits-00.txt Ubiquitous Access Redundancy/Fault-Recovery Load Sharing Load Balancing Preference Settings

6. 59 th IETF – NEMO Working Group 6 Contents (4)  Sect 4: Problem Statement  Identifies the main problem when trying to reach the goals with NEMO Connection Availability Connection Selection Scalability RO Consideration Ingress Filtering Failure Detection

7. 59 th IETF – NEMO Working Group 7 Contents (5)  Sect 5: Evaluation of Basic NEMO Solution  Discusses issues and problems implementers might face for each of the 8 identified multihomed NEMO configurations

8. 59 th IETF – NEMO Working Group 8 Moving Forward  Decide on which scenario is useful for NEMO  Is the content structure of the draft okay?  Introduction  Classification/Taxonomy  Benefits/Scenarios  Problem Statement  Evaluation of NEMO Basic Support

9. 59 th IETF – NEMO Working Group 9 (1,1,1): 1 MR, 1 HA, 1 Prefix  Scenario:  Multi-mode MR (a MR with GPRS and 802.11)  Benefits:  Ubiquitous Access, Redundancy/Fault-Recovery  Problems/Issues:  Need to associate multiple CoAs to one NEMO prefix  Clearly NEMO-Specific MNN MNN MR INTERNETHA P

10. 59 th IETF – NEMO Working Group 10 (1,1,N): 1 MR, 1 HA, N Prefixes  Scenario:  Car with a single MR and different sub-nets, one for sensors, one for data  Benefits:  Ubiquitous Access, Redundancy/Fault-Recovery  Problems/Issues:  Need to associate multiple CoAs with one or multiple prefixes MNN MNN MR INTERNETHA P 1,P 2

11. 59 th IETF – NEMO Working Group 11 (1,N,1): 1 MR, N HA, 1 Prefix  Scenario:  dynamically assign/selects home-agents to reduce delays Transatlantic flight  Benefits:  Ubiquitous Access (reduce delays)  Redundancy (HA failure)  Problems/Issues:  One HoA registered at different home agents MIPv6 specific  One NEMO-Prefix advertised by different home agents Complex problem Best left to multi6 WG MNN MNN MR INTERNET HA-1 PHA-2

12. 59 th IETF – NEMO Working Group 12 (1,N,N): 1 MR, N HAs, N Prefixes  Scenario:  Multi-mode MRs (8012.11+3G) subscribing to different ISPs  Benefits:  Ubiquitous Access, Fault-Recovery  Problems/Issues:  Similar problems with (1,N,1)  However, NEMO can support the case when each NEMO-Prefix is only registered with one home agent MNN MNN MR INTERNET HA-1 P 1,P 2HA-2

13. 59 th IETF – NEMO Working Group 13 (N,1,1): N MRs, 1 HA, 1 Prefix  Scenario:  Multiple MRs A Wireless-PAN with GPRS phone and 802.11 PDA  Benefits:  Load-Sharing, Ubiquity, Fault-Recovery  Problems/Issues:  None MNN MNN MR-1 INTERNETHA P MR-2 P

14. 59 th IETF – NEMO Working Group 14 (N,1,N): N MRs, 1 HA, N Prefixes  Scenario:  Trains/ships with one MR in each car/cabin  Benefits:  Load Sharing  Problems/Issues:  None MNN MNN MR-1 INTERNETHA P1P1 MR-2 P2P2

15. 59 th IETF – NEMO Working Group 15 (N,N,1): N MRs, N HAs, 1 Prefix  Scenario:  Train/Ship with satellite dish and antenna to use ground-bases telecommunications infrastructure  Benefits:  Load-sharing, Fault-recovery  Problems/Issues:  Same issue as (1,N,1) where one NEMO- prefix is registered at two home-agents MNN MNN MR-1HA-1 P MR-2 P HA-2 INTERNET

16. 59 th IETF – NEMO Working Group 16 (N,N,N) Mobile Network  Scenario:  W-PAN with 802.11 PDA and GPRS Phone subscribing to different ISPs  Benefits:  Load-Sharing, Fault-Recovery, Ubiquitous Access  Problems/Issues:  Main problem is if a prefix is registered by more than one home-agent  NEMO can support the case when each NEMO- Prefix is only registered to one home-agent  Issue raised on burden of MNNs to remember which MR advertises which prefix MNN MNN MR-1HA-1 P1P1 MR-2 P2P2 HA-2 INTERNET