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

Configuration
Manual Configuration
Chapter 326
Creating a “6to4” Point-to-Multipoint Configured Tunnel
“6to4” offers a point-to-multipoint router-to-router tunneling mechanism
for traffic going between IPv6 domains over an IPv4 network. One of the
advantages of “6to4” over configured tunneling is that the source router
can talk to any other “6to4” router without the need for any manual
configuration on the destination router. Thus, “6to4” tunnels do not
suffer the scalability problem that configured tunnels do.
A sample netconf-ipv6 file entry to configure a “6to4” tunnel is as
follows:
TUN_INTERFACE_NAME[1]=”iptu1”
TUN_TYPE[1]=”6to4”
TUN_ENCAP_SRC_ADDRESS[1]=”15.13.1.2”
TUN_INTERFACE_STATE[1]=”up”
In this example, the TUN_LOCAL_ADDRESS[1] was not specified since the
the “6to4” address for this value can be automatically configured based
on the TUN_ENCAP_SRC_ADDRESS[1] value. For example, if the
TUN_ENCAP_SRC_ADDRESS is 15.13.1.2, the “6to4” prefix is
2002:0f0d:0102, which can be combined with an interface identifier of “1”
to form the “6to4” address 2002:0f0d:0102::1.
The TUN_REMOTE_ADDRESS[1] parameter must not be specified
since“6to4” is an automatic point-to-multipoint tunnel. The remote
end-point of the tunnel will be determined based on routing information.
Similarly, the TUN_ENCAP_DST_ADDRESS[1] parameter, must not be
specified since the destination address will be automatically derived
from the destination “6to4” address.
Enabling rtradvd (Router Advertiser Daemon)
When rtradvd is configured, it sends router advertisement messages to
a local LAN periodically, and, when requested, by a node sending a
router solicitation message. Refer to the rtradvd(1M) man page for more
information.
Configuration for rtradvd is set, on a per interface basis, by editing the
/etc/rtradvd.conf file. The rtradvd.conf file allows for setting global
defaults as well as interface specific settings for both interface options
and prefixinfo specific options. Refer to the rtradvd.conf(4) man page
for more information.