HP-UX 11i Version 2 Release Notes (October 2003)

Internet and Networking
IPv6 Support
Chapter 6
151
• IPv6 tunneling enables IPv6/IPv4 hosts and routers to connect with other IPv6/IPv4
hosts and routers over the existing IPv4 network. IPv6 tunneling encapsulates IPv6
datagrams within IPv4 packets. The encapsulated packets travel across an IPv4
network until they reach their destination host or router. The IPv6-aware host or
router decapsulates the IPv6 datagrams, forwarding them as needed. IPv6 tunneling
eases IPv6 deployment by maintaining compatibility with the large existing base of
IPv4 hosts and routers.
• Ethernet Links and FDDI links.
• IPv6 Stateless address autoconfiguration.
• IPv6 Neighbor Discovery (which includes Router Discovery and Duplicate Address
Detection).
• TCP/UDP over IPv6, PMTUv6, ICMPv6, IPv6 MIBs, Sockets APIs.
• Network Configuration and Troubleshooting Utilities for both IPv4 and IPv6
transport: ifconfig, netstat, ping, route, ndd, ndp (neighbor-discovery command
for IPv6 only) and traceroute.
•New netconf-ipv6 File Stores IPv6 Settings
The /etc/rc.config.d/netconf-ipv6 configuration file stores IPv6 configuration
information similar to IPv4's netconf file.
• /etc/hosts Supports IPv4 and IPv6 Addresses
The /etc/hosts file contains IP addresses and corresponding host names. The file
can contain IPv4 and IPv6 addresses for the same host. Lookup policies are identical
to IPv4.
• Name Service Switch
/etc/nsswitch.conf (nsswitch.conf (4)) is a configuration file for the name service
switch. A new entity, ipnodes, specifies which name services resolve IPv6 addresses
and host names.
Impact
With only a few configuration steps, customers can enable IPv6 network transport
software and realize the functional benefits of IPv6 and IPv6-enhanced components.
For customers not planning to use IPv6 software, there is no impact. Even though the
software is included, there is no action needed to “not use” IPv6.
Compatibility
There are no compatibility issues with having IPv6 software in HP-UX 11i v2.
Performance
There are no performance issues.
Documentation
The following manpages have changed or are new:
• bind (2)
• connect (2)
• ifconfig (1M)