HP-UX IPv6 Transport Administrator's Guide for TOUR 2.0 (April 2004, rev 2)
Features Overview
IPv6 Transport (bundled as part of TOUR 2.0)
Chapter 14
For more information on InfiniBand and the IPoIB protocol, refer to
the HP-UX InfiniBand Support Guide available at
http://www.docs.hp.com/hpux/netcom/index.html#InfiniBand.
• Multicast Listener Discovery (MLD) Support (Host Portion
Only): The host part of Multicast Listener Discovery (MLD) protocol
for IPv6 based on RFC 2710 “Multicast Listener Discovery (MLD) for
IPv6”, is supported. MLD is automatically enabled when an IPv6
interface is initialized. The Management Information Base for MLD,
based on RFC 3019, is also supported.
RFC 2710 specifies the protocol used by an IPv6 router to discover
the presence of multicast listeners (that is, nodes wishing to receive
multicast packets) on its directly attached links, and to discover
specifically, which multicast addresses are of interest to those
neighboring nodes. This protocol is referred to as Multicast Listener
Discovery or MLD. MLD is derived from version 2 of IPv4’s Internet
Group Management Protocol, IGMPv2. One important difference to
note is that MLD uses ICMPv6 (IP Protocol 58) message types,
rather than IGMP (IP Protocol 2) message types.
For more MLD information refer to RFC 2710, “Multicast Listener
Discovery (MLD) for IPv6”.
• Router Advertisement: Router Functionality as specified in RFC
2461 “Neighbor Discovery for IP Version 6 (IPv6)”, is implemented
with a daemon, rtradvd, and an accompanying configuration file,
/etc/rtradvd.conf. The rtradvd daemon listens to router
solicitation and sends router advertisement messages on demand or
periodically (as described in RFC 2461). These advertisements allow
any listening host to configure their addresses and some other
parameters automatically without manual intervention. They can
also choose a default router based on these advertisements
Router advertisement is configured on a per interface basis. Refer to
the rtradvd.conf(4) man page for more information.
• IPv6 Transition Mechanism Enhancements: TOUR 2.0 provides
several IPv6 transition mechanism changes from those previously
offered in base (default) HP-UX 11i v2. Highlights of these changes
are provided below. There have been no changes to the dual stack
mechanism, but several important changes to the tunneling
mechanisms. The following RFCs are now supported in TOUR 2.0
(the IETF documents listed below are available at
http://www.ietf.org):