Introducing HP-UX Mobile IPv6

8
2.3 HP-UX Mobile IPv6 Product Features
The following is a list of some of the major features HP-UX Mobile IPv6 provides:
IETF Standards Conformance
Route Optimization
Return Routability Procedure
Dynamic Home Agent Address Discovery
Prefix Discovery
Multi-Processor Scaling
Compatibility with HP-UX IPSec A.02.00
nettl Tool Support
TAHI Conformance and Connectathon Interoperability Testing
Prerequisite Software Packaging
Dynamic Re-configuration
2.3.1 IETF Standards Conformance
HP-UX Mobile IPv6 is based on the following IETF standards, which are available at
http://www.ietf.org
:
RFC # 3775: Mobility Support in IPv6
RFC # 3776: Using IPSec to Protect Mobile IPv6 Signaling between Mobile Nodes and Home Agents
2.3.2 Route Optimization
In most cases, the Mobile Node and Correspondent Node communicate using Route Optimization,
which improves data transmission rates between the two nodes. With Route Optimization, the Mobile
Node and Correspondent Node communicate directly with each other and bypass the Home Agent.
The Correspondent Node sends packets directly to the Mobile Node’s Care-of Address, and the
Mobile Node sends packets directly to the Correspondent Node. Compare the following figure, which
shows the data path from a Correspondent Node to Mobile Node using Route Optimization, with the
figure in section 2.2.1 which shows the same data path in Basic Operation.
Foreign Network
Home Network
Home Agent
Mobile Node
Correspondent
Node
For a dramatic example of how Route Optimization improves data transmission rates between Mobile
Nodes and Correspondent Nodes, consider the data path when the Mobile Node travels to a Foreign
Network in which the Correspondent Node resides. Bypassing the Home Agent in this situation clearly
improves performance.