HP-UX IPv6 Transport Administrator Guide HP-UX 11i v3 (5992-6426, May 2013)

connectivity through the overwritten autoconfigured IP address is temporarily lost. At a
later time, when the host receives the next router advertisement, the host will bring up
another secondary interface with a different IP index number, but with the same IP address,
and network connectivity through that IP address is restored. Normally, a user can avoid
this by checking used IP index numbers. However, there is always a possibility that
address autoconfiguration due to router advertisement is happening concurrently while
the user manually configures secondary interfaces.
Disabling Specific IPv6 Interfaces
To disable communication through a specific IP address on an autoconfigured secondary
interface, that secondary interface must be marked down, not removed or overwritten
with a different IP address. If that interface is removed or overwritten, the host will
reconfigure another secondary interface with the same IP address when it receives the
next router advertisement. Alternatively, the router can be configured to stop advertising
the prefix that corresponds to the offending IP address.
Removing An Interface
A primary interface cannot be removed from the system until all secondary interfaces
are removed. You can remove secondary interfaces from the system using the ifconfig
inet6 command, as in the following example:
ifconfig lan1:1 inet6 ::
The primary interface (for example, lan1) can then be removed from the system with the
ifconfig command, as in the following example:
ifconfig lan1 inet6 unplumb
A loopback interface does not have a hardware device associated with it. The name of
the loopback interface is lo0. A loopback interface is automatically created by the system.
You cannot delete it.
Networking Terminology
The following are descriptions of some important IPv6 networking terms.
Node
A node is a device that implements IP on the network. A node can be a host or a router.
A local node (or host) is the computer (or host) where you have logged-in. A remote node
is a computer on the IP network where you are not logged in. A remote node does not
have to be directly attached to your terminal.
Router
A is a node that forwards IP packets not explicitly addressed to itself. It is a device that
can forward packets between two or more IP networks. An IPv6 router can advertise
prefixes. IPv6 router guidelines are beyond the scope of this manual. Refer to RFC 2461
for IPv6 router guidelines.
Networking Terminology 51