HP-UX IPv6 Transport Administrator's Guide for TOUR 2.0 (April 2004, rev 2)

Features Overview
Limitations
Chapter 18
Limitations
The following section describes limitations of HP-UX 11i v2 IPv6 in
TOUR 2.0 transport. These limitations also exist in base (default)
HP-UX 11i v2 IPv6 transport.
setparms Not Enhanced for IPv6 Configuration
On HP-UX 11i v2, the setparms utility has not been enhanced to support
IPv6 configuration.
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.
SAM Limitation
SAM has not been enhanced to support the tunneling enhancements
available with TOUR 2.0. TOUR 2.0 tunneling configuration must be
done by editing the /etc/rc.config.d/netconf-ipv6 file or by using
the ifconfig command.
Socket Caching Limitation
Socket caching does not support IPv6.