Transcript Requirements for MANET Address Autoconf

MANT Address Autoconfiguration Issues
draft-jeong-manet-addr-autoconf-reqts-01.txt
draft-jeong-adhoc-ip-addr-autoconf-02.txt
draft-jeong-manet-aodv-addr-autoconf-00.txt
Jaehoon Paul Jeong
ETRI
[email protected]
http://www.adhoc.6ants.net/~paul/
2nd March 2004
IETF-59 MANET WG
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Contents
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Why is MANET Address Autoconf necessary?
Requirements for MANET Address Autoconf
Procedure of MANET Address Autoconf
MANET Address Autoconf for AODV
Further Work of Our Solution Mechanism
Discussion
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Why is MANET Address Autoconf necessary?
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Four basic MANET unicast routing protocols will be in the status of experimental
RFC.
– AODV, DSR, OLSR and TBRPF
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Next Step of MANET WG?
– Addressing is one of the most essential requirements in IP networking.
• Automatic IP address configuration is necessary in MANET experiencing dynamic
topology changes.
– Various approaches have been suggested in the research domain
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Stateless vs. Stateful approaches
Strong DAD vs. Weak DAD
Active DAD vs. Passive DAD
Prophet Address Allocation
Therefore, it is time to develop MANET IP Address Auto-configuration from
Engineering Philosophy.
– First of all, MANET WG should define the requirements for MANET Address
Autoconf.
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Requirements for MANET Address Autoconf
(draft-jeong-manet-addr-autoconf-reqts-01.txt) - 1/3
• Join and Departure of Mobile Nodes
[R1] Address autoconf protocol MUST support timely
autoconfiguration of IP address for a mobile node.
[R2] Address autoconf protocol MAY support mechanisms to
probe whether a mobile node moves into another MANET.
[R3] Mobile nodes using address autoconf protocol MUST
validate allocated IP addresses when powering up or
rebooting.
[R4] Mobile nodes using address autoconf protocol MAY
validate allocated IP addresses when moving into a new
network.
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Requirements for MANET Address Autoconf
(draft-jeong-manet-addr-autoconf-reqts-01.txt) - 2/3
• Network Partitioning and Merging
[R5] Ad hoc address autoconf protocol MUST detect and
resolve address conflicts in a timely manner and on an
ongoing basis.
[R6] Ad hoc address autoconf protocol MUST allow conflicted
address replaced with another.
[R7] Ad hoc address autoconf protocol SHOULD minimize the
damage, such as loss of delivered packets, due to address
replacement.
[R8] Addresses SHOULD be allocated or autoconfigured in a
way that minimizes the probability that two or more nodes
will have the same address.
[R9] In order to detect duplicate addresses, ad hoc address
autoconf protocol MAY
getMANET
the aid
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WG of ad hoc routing protocol.
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Requirements for MANET Address Autoconf
(draft-jeong-manet-addr-autoconf-reqts-01.txt) - 3/3
• Internet Connectivity
[R10] MANET SHOULD allow configuration of zero or more
gateways for the global connectivity to the Internet.
[R11] Mobile Node that desires Internet connectivity MAY have
a globally routable IP address.
• Other Scenarios?
– We need your feedback and suggestion.
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Procedure of MANET Address Autoconf
(draft-jeong-adhoc-ip-addr-autoconf-02.txt), discussed at IETF-57
• Step 1: Address selection
– How to select one of IP addresses in the address space.
• Step 2: Duplicate address detection
– How to detect a duplicate address
• Step 3: Address change negotiation
– Which node should perform a reallocation procedure
• Step 4: Maintenance of upper-layer sessions
– How to let an upper-layer session avoid a connection breakage
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MANET Address Autoconf for AODV
(draft-jeong-manet-aodv-addr-autoconf-00.txt)
• Step 1: Address selection
– Random Address Selection
• Step 2: Duplicate address detection
– Hybrid DAD: Strong DAD + Weak DAD
• Step 3: Address change negotiation
– Address change indication similar to MIP binding update
• Step 4: Maintenance of upper-layer sessions
– Data delivery through IP tunneling
• Address Mapping Cache management is necessary.
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Further Work of Our Solution Mechanism
• Victim Node Selection
– Which node should give up its address ?
• Consideration of the number of on-going sessions
• Consideration of fairness
• Maintenance of Upper-layer Sessions
– How to avoid the connection breakage even after address change
• Address Mapping Cache
– Data structure of the cache and how to maintain it
• Applicability into each MANET routing protocol
– DSR, OLSR and TBRPF
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Discussion
• Will MANET WG accept MANET Address
Autoconf as next item?
– draft-jeong-manet-addr-autoconf-reqts-01.txt
• Suggestion and Question?
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