TOUR Transition Release Notes (September 2004)(11i v1 and 11i v2)

Transport Optional Upgrade Release Transition Release Notes

Announcement

route inet6 [-f] [-n] delete [net|host] v6destination [ / prefix] v6gateway

[count] [source v6src]

The enhanced route command provides users with greater control over their network packet

flow. It greatly enhances the viability of the Strong End System (Strong ES) model of routing

packets.

Congestion Window Validation This feature was introduced in TOUR 3.0.

The estimate of the available network capacity is reflected by the congestion validation

window. Previously, this estimation becomes less accurate over time. This happens when the

capacity that was previously used by a network-limited connection is used by other traffic.

Thus the most recent knowledge of the TCP connection, regarding the state of the network

path, is not reflected when the sender is application limited.

The transition patches PHNE_35351 (for HP-UX 11i v1) and PHNE_35765 (for HP-UX 11i v2

September 2004) implement Congestion window validation according to RFC 2861. The

capacity reflected by the congestion window is more accurate due to the following

modifications:

• TCP's congestion control algorithm decays the congestion window cwnd after transitioning

from a sufficiently long application-limited period while using the slow-start threshold

ssthresh to save the previous value of the congestion window.

• An application-limited TCP sender that has not fully used the current congestion window,

does not increase the congestion window.

Internal TCP and UDP Enhancements This feature was introduced in TOUR 3.0.

The transition patches PHNE_35351 (for HP-UX 11i v1) and PHNE_35765 (for HP-UX 11i v2

September 2004) contain enhancements that modify some of the internal behavior of TCP and

UDP. This results in improved network scalability, especially for high end Non-Uniform

Memory Access (NUMA) systems and under heavy load conditions.

Dynamic keying support for MIPv6 A.02.01 (or later) with IPSec A.02.01 (or later)

This feature was introduced in TOUR 3.0.

The transition patch PHNE_35765 (for HP-UX 11i v2 September 2004) includes an

enhancement that enables dynamic negotiation of IPSec keys using the Internet Key

Exchange (IKE) v1 protocol on HP-UX 11i v2 September 2004 release. Refer to the HP-UX

Mobile IPv6 Release Notes at http://docs.hp.com/en/netcom.html#Mobile%20IP for more

details.