HP-UX IPv6 Transport Administrator's Guide for TOUR 2.0 (April 2004)

Features Overview
Known Problems and Limitations
Chapter 1 9
Known Problems and Limitations
The following section describes known problems and limitations of
HP-UX 11i v1 TOUR 2.0 transport.
Known Problems
This section contains information about a known problem in HP-UX 11i
v1 TOUR 2.0.
• Socket Caching and IPv6 Usage
Problem: When socket caching is enabled, applications opening an
IPv6 socket may get an IPv4 socket, which will result in an IPv6
ioctl() failure.
Workaround: If you need to use IPv6, use ndd to completely disable
socket caching.
Resolution: This will be addressed in a subsequent TOUR patch or
release.
Limitations
The following limitations exist for HP-UX 11i v1 TOUR 2.0.
Multihomed Host Limitation
In the absence of a router that is advertising prefixes, no more than one
interface can be configured with IPv6 addresses on a host with multiple
physical network interfaces. If multiple physical interfaces are
configured with IPv6 addresses, and if there is no Router Advertisement
received on any interfaces, the host has no way of knowing which
interface to send packets out on. If packets are sent out on the interface
that is on a different link than the destination node, then communication
will fail. This configuration is neither recommended nor supported.
Distributed File System Limitations
NIS+, NIS, and NFS are currently not supported over IPv6.