FMIPv6 Implementation Issues

1
FMIPv6 Implementation Issues

• Vijay Devarapalli, Sundar Jeyaraman and Rajeev
  Koodli
• Nokia Research Center
• Mountain View, CA USA

2
Test Environment

• UNIX-based Router, Linux MN
• 11 Mbps WLAN
• Network-initiated handover

Visited Network
NAR
PAR
Previous Router
New Router
3
Issues

• What destination address to use in the F-BU
  packet ?
• Link-local
• Global IP address (preferred since it is needed
  if F-BU has to be re-transmitted from New Access
  Router)
• Creating Binding Cache entry on Previous Access
  Router
• after receiving Hack
• after sending F-Back to the old link

4
Issues..

• Sending F-BU from NAR What source address to use
  ?
• What NAR supplies in response to F-NA
• Sending F-NA
• including only one IP address suffices

5
Issues..

• When to change the default router ?
• After receiving Proxy RA ? Perhaps No
• After actually attaching to the new link (the new
  AR) ?

6
(No Transcript)
7
Other issues..

• Lifetime of previous CoA on NAR
• when to configure a new CoA
• when to expire the host route entry
• Sending F-NA, again..Unsolicted multicast to
  all-nodes address
• What do other nodes do with this message ?
• if there was a proxy NA, will attempt to update
  ND cache entry (for this, the O bit has to be
  set
• ignore F-NA otherwise
• meaning of REACHABLE state
• the sender has to be certain that the receiver is
  reachable
• ND does not set to REACHABLE upon receiving a NA
  with S bit 0