Transcript Network Mobility Support in IPv6 - Grenoble

Network Mobility Support
in IPv6
Thierry Ernst - Motorola Labs & INRIA (Planete)
51st IETF London - Thierry Ernst - August 2001
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Subject 1
 Subject 1: what is Network Mobility Support
 Subject 2: Network Mobility Support with Mobile IPv6
 Subject 3: We solicit agreement of the working group for a
number of motions
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Network Mobility Support: Introduction
 Have you read “Network Mobility Support in IPv6:
Problem Statement and Requirements” (draft-ernstmobileip-monetv6-00.txt) ?
posted July 2001
protocol-independent understanding (e.g. NOT based on Mobile
IPv6)
• terminology
• problems
• requirements
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Network Mobility Support: Terminology
MNNs = different kind of nodes in the mobile network:
•
•
•
•
Mobile Router (MR) = Border router of the mobile network
LFNs = Local Fixed Nodes permanently located in mobile network
LMNs = Local Mobile Nodes that belong to the mobile network
VMNs = Visiting Mobile Nodes that do not belong to the mobile network
CNs = all nodes communicating with MR, LFNs and LMNs, VMNs
CN
HA
MN’s home link
AR
MN
AR
HA
home link
foreign link
LFN
MR
LFN
MR
Router
Router
VMN
LFN
LFN
LFN
LFN
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Network Mobility Support
 Objectives of Network Mobility Support:
permanent connectivity for ALL MNNs
optimal routing between CNs and ALL MNNs
 Problems and Requirements in draft describe the
scenarios and issues
 Network Mobility Support deserves its own solutions
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Subject 2
 Subject 1: what is Network Mobility Support
 Subject 2: Network Mobility Support with Mobile IPv6
 Subject 3: We solicit agreement of the working group for a
number of motions
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Potential Solutions
 Network Renumbering
how do you perform optimal routing ?
 Routing
does not scale to wide-area network
 Mobile IPv6-based:
MIPv6 may be a good candidate solution
needs extensions
needs to be evaluated first
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Mobile IPv6-based solution: issues
 There is no explicit support of mobile networks in the
Mobile IPv6 specification. Issues:
redirection by the HA of packets intended to MNNs is not clear
optimal routing between CNs and MNNs
nested mobility:
• VMNs,
• LMNs,
• Mobile IP-subnet in the mobile network itself
scalability to a large number of mobile networks
how should the MR run a routing protocol ?
• What should we do with router advertisements sent on the home link ?
• What if several routers in the mobile network ?
• How it interacts with the routing protocol running in the home / visited
network ?
 Some issues highlighted in draft ernst-mobileip-v6-02.txt
draft focus on LFNs.=> not all isssues are covered
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Mobile IPv6-based solution: Current Proposals
 Before draft-ietf-mobileip-ipv6-14:
support of mobile networks not considered
this has been demonstrated in draft-ernst-mobileip-v6-network00.txt at 48th IETF Pittsburgh August 01.
 draft-ietf-mobileip-ipv6-14 posted last July:
adds a new sub-option that tells the prefix length to HA and CNs
we think that this section:
• tries to solve a problem which is not yet well-understood in the Mobile IP
community
• does not solve the whole issue
• adds more issues (particularly security)
• at the risk of further delaying MIPv6 as Proposed Standard
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Mobile IPv6-based solution: Current Proposals
 Prefix Scope Binding Update (MOTOROLA / INRIA)
• draft-ernst-mobileip-v6-network-02.txt
• more appropriate to support LFNs
 HMIPv6 Extended Mode (ERICSSON / INRIA )
draft-ietf-mobileip-hmipv6-04.txt
more appropriate to support VMNs
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Mobile IPv6-based solution: appropriate?
 All issues not covered
 All solutions may not scale to a large number of CNs or a
large mobile network
 Shall we base solution on Mobile IPv6 ?
Mobile IPv6’s suitability must be studied first.
• List all issues pertaining to MIPv6
Define the scope of the problem with respect to MIPv6
• Do we want to support all kind of networks with MIPv6 ?
• Is that even feasible ???
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Subject 3
 Subject 1: what is Network Mobility Support
 Subject 2: Network Mobility Support with Mobile IPv6
 Subject 3: We solicit agreement of the working group for a
number of motions
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1st Motion
 Mobile IP WG is the right place to discuss Network
Mobility Support
 Add Network Mobility Support in the Mobile IP WG
Charter
2 main objectives:
• provide continuous Internet access to ALL MNNs
• offer optimal routing between CNs and ALL MNNs
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2nd Motion
 The Mobile IP Working Group needs:
to agree on a terminology
to define the scope of the problem
to define the requirements
 Add Deliverables in Mobile IP WG:
A draft that defines:
• terminology
• requirements
• based on draft-ernst-mobileip-monetv6-00.txt
A draft that
• lists Mobile IPv6 issues
• defines the scope of the problem with respect to MIPv6
Could be a single draft depending on if solutions should (could ?)
be based on Mobile IPv6 or not
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3rd Motion
 Network Mobility Support SHALL NOT further delay
Mobile IPv6 as Proposed Standard
Potential extensions shall be included in a separate document
• new features must not be included in MIPv6
• the sub-option included in draft-v14 shall be removed
We should only make sure that what is already in the Mobile IPv6
specification does not prevent network mobility support
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4th Motion
 Adopt “Prefix Scope Binding Updates” (draft-ernstmobileip-v6-network-02.txt) as a working group draft
basic support of MNNs
only left issue = authorization to register a careof address for a
prefix
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Thank you
 Fore more information:
http://www.inrialpes.fr/planete/
• Draft, presentation made at the IETF and other documents
Network Mobility Support in IPv6: Problem Statement and
Requirements
 draft-ernst-mobileip-monetv6-00.txt
Prefix Scope Binding Updates:
 draft-ernst-mobileip-v6-network-02.txt
HMIPv6 Extended Mode
 draft-ietf-mobileip-hmipv6-04.txt
Seamoby Working Group - micro-mobility design team
 draft-ietf-seamoby-mm-problem-01.txt
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