TCP/IPv6 Configuration and Management Manual (G06.29+, H06.03+, J06.03+)

Example Illustrations and Adding Features to the
Basic Configuration
HP NonStop TCP/IPv6 Configuration and Management Manual—524523-012
5-5
DUAL-Mode, Configured Tunnel

As you do not want the SUBNETs to share an IP address, each SUBNET can keep
the IPv6 addresses automatically assigned to it. You do, however, have the option
of specifying a prefix for the IPv6 addresses; the final addresses assigned to the
SUBNETs still differ in this case as the interface IDs are different (different
SUBNETs have different interface IDs). For an example of configuring Ethernet
failover with nonshared IP and specifying the prefix, see Example 8-5
on
page 8-57 in the ADD SUBNET Command for TCP6MAN
on page 8-25
description.

For Ethernet failover, nonshared IP, you do not need a reserved IP address.
DUAL-Mode, Configured Tunnel
Example 1-10 on page 1-19 shows how to configure the subsystem with a configured
tunnel. This configuration is shown in Figure 5-5.
In NonStop TCP/IPv6, after you establish the TCP6MON in DUAL mode and you add
an INET type SUBNET (IPv4), an automatic tunnel SUBNET named TUN is added to
the system. If you want to create another tunnel, add a SUBNET of TYPE TUN (with a
name starting with IPT) and specify both source and destination IP addresses.
A configured tunnel allows full IPv6 addressing and functionality between your host
and another IPv6 host over an IPv4 network. Automatic tunneling requires no
configuration and also lets you communicate over an IPv4 network but automatic
tunneling is limited to IPv4 addressing and functionality.
This example shows that:

First you add and start a DUAL-mode SUBNET

The next step is to add a SUBNET of TYPE TUNNEL and ALTER it to bring up
IPv6.
Figure 5-5. DUAL-Mode SUBNET, Configured Tunnel, Example 1-10
Host, Dual Mode
172.14.215.27
SN3
VST136.vsd
IPT1
(tunnel)
IPv6 Host
IPv4/6 Network
Automatically-assigned
IPv6 address (SN3)
172.14.215.27
172.17.215.240
TUN