MN-HA Signaling for HA Unavailability

1
MN-HA Signaling for HA Unavailability

• Brian Haley, Vijay Devarapalli, Deng Hui, James
  Kempf

2
Why?

• Some reasons a signaling mechanism is needed
• HA going offline
• HA overloaded
• HA address changing
• Bootstrapping

3
Current drafts

• draft-wakikawa-mip6-nemo-haha-spec-00.txt
• Defines a Home Agent switch message
• A new Mobility Header type to switch a Mobile
  Node to another Home Agent
• draft-deng-mip6-ha-loadbalance-02
• Uses new Mobility Header type to send a single
  Home Agent address to a Mobile Node
• Previously used DHAAD
• draft-kempf-mip6-ha-alert-00
• Uses new ICMPv6 message to send multiple Home
  Agent addresses to a Mobile Node
• Each draft defines its own security required for
  messages

4
New Messages

• A Mobility header message from HA to MN
• Signals to the MN that it wont serve the MN any
  longer
• Suggests one or more alternate HA addresses
• MN can pick the alternate HA from the message or
  perform DHAAD again
• A Mobility header message from MN to HA
  acknowledging the above message
• IPsec protection
• BU/BAck SA can be used

5
Example

• -------------------------
  -------
• Payload Proto Header Len Type (TBD)
  Reserved
• -------------------------
  -------
• Checksum of addresses
  Reserved
• -------------------------
  -------
• 
  
• . Home Agent Addresses...
  .
• .
  .
• 
  
• -------------------------
  -------

6
Future

• Necessary Work?
• Become WG Document?
• Comments?