Intermec 6710 - Manual (Page 234)

APPENDIX E
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OWL/IP
E-12 6710 Access Point User’s Guide
Additionally, IP frames are only forwarded inbound if the IP
address belongs to the home subnet (see “Subnet Filtering,”
page E-6).
Station Mobility
As stations move through a facility, they roam between
access point coverage areas. In large installations, these
access points may be on different IP subnets. OWL/IP is
designed to support rapid roaming in these environments.
A “roam” requires updates to the forwarding databases in
the new access point, super root, previous access point, and
any intermediate designated bridges.
A roam is initiated when a station attaches to a new access
point. This access point sends an attach message to the
super root, which in turn forwards a detach message to the
previous access point, allowing each access point to update
its forwarding database. Designated bridges monitor these
exchanges and update their forwarding databases.
Mobile IP Comparison
The Internet Engineering Task Force has developed RFC
2002, IP Mobility Support, commonly referred to as Mobile
IP. Mobile IP is designed primarily to address the needs of
IP stations that may move between geographically
separated locations.
OWL/IP is designed primarily to operate in local area
environments, where handcarried or vehicle mounted
stations may move rapidly between access point coverage
areas on a subnetted LAN. The two technologies are
complimentary and may coexist. Table E-1 summarizes
some differences.