HP (Hewlett-Packard) E3000 MPE/IX ユーザーズマニュアル

Configuring a Point-to-Point Node

You need to visit the next two screens only if you are configuring a
non-gateway node that is on the same network as a gateway. In this
case, the non-gateway node needs to know the identity of any neighbor
gateway. Neighbor gateways can be either full or half gateways.

Gateways that are on the same network are called neighbor
gateways. A non-gateway node on a Point-to-Point network may need
to go through a neighbor gateway in order to send messages to an
entirely different network. (Two nodes are on the same network if the
network portion of their IP addresses are the same.) All Point-to-Point
nodes that are on the same network as a neighbor gateway need to
know the identity of any neighbor gateways. When you configure a
Point-to-Point node, you enter into its configuration the identity of any
accessible neighbor gateways that share the same network. The
identified gateways may be either full or half gateways.

You may designate one gateway as a default gateway. Messages for a
network will be routed to the default gateway if there is no gateway
configured for the destination network. The default gateway will then
attempt to locate the destination of the message.

HP e3000 should not be used as a gateway.