HP 3000 Manuals

Configuring and Managing Host-Based X.25 Links

Configure Neighbor Gateways 

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.  (Go back one
level by pressing the [Prior Screen] key, then select [Neighbor Gateways] 
key).

Gateways that are on the same network are called neighbor gateways.  A
non-gateway node on an X.25 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 X.25 nodes that are on the same network as
a neighbor gateway need to know the identity of any neighbor gateways.
When you configure an X.25 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.

Identify Neighbor Gateways (If Any Are Present) 

NMMGR displays the Neighbor Gateways screen ( Figure 6-7 )when you
press the [Neighbor Gateways] key at the X.25 Configuration screen.


          Figure 6-7.  Neighbor Gateways Screen 

   1.  In the Gateway name field, enter the name of a gateway that is on
       the same network as the node that you are configuring.

   2.  If you are adding the identified gateway for the first time, press
       the [Add] key.  If you are modifying the configuration of this
       node, press the [Modify] key.  The Neighbor Gateway Reachable
       Networks screen will be displayed.  Proceed to "Identify Neighbor
       Gateway Reachable Networks."

   3.  Repeat steps 1 and 2 for each gateway that is on the same network
       as the node that you are configuring.  When you have finished,
       press the [Next Screen] key to return to the X.25 Configuration
       screen.

Fields 

Gateway name          Each gateway name can be as long as eight
                      alphanumeric characters.  The first character must
                      be alphabetic.

Identify Neighbor Gateway Reachable Networks 

NMMGR displays the Neighbor Gateway Reachable Networks 
( Figure 6-8 ) when you press the [Add] key or the [Modify] key for a
valid gateway name from the Neighbor Gateways screen.


          Figure 6-8.  Neighbor Gateways Reachable Networks 

   1.  In the Neighbor Gateway IP Internetwork Address field, enter the
       IP address of the gateway specified on the Neighbor Gateways
       screen.  An example is:

       C 192.007.007 001

   2.  In the IP Network Address fields 
       under the title Configured  Reachable Networks, enter the IP
       addresses of all the remote networks that can be reached through
       the gateway whose IP address is configured in the previous field.

   3.  The IP subnet mask is optional.  If entering one, tab to the next
       field.  In the IP subnet mask field, enter the number in the same
       format as an IP address.  For details on deriving an IP subnet
       mask, refer to the HP 3000/iX Network Planning and Configuration 
       Guide (36922-61023).

   4.  In the field labeled Hops, enter the number of hops (full
       gateways) needed to get to the target network.  Two partner
       gateway halves count as one hop.

   5.  Repeat steps 2, 3, and 4 for each remote reachable network.  If
       you need to configure more than 10 networks, press the [Save Data] 
       key then press the [Next Page] key to enter more networks.

   6.  After you have finished entering the IP addresses of all the
       reachable networks, press the [Save Data] key.  Press the [Next 
       Screen] key to return to the Neighbor Gateways screen.

   7.  Back at the Neighbor Gateways screen, after you have finished
       adding all of the neighboring gateways, press the [Next Screen] 
       key to return to the X.25 Configuration screen.  Follow
       instruction 7 in the section in this chapter called "Step 6:
       Configure X.25 Network."

Fields 
If you have identified any neighbor gateways, then you will also be
identifying:  1) the IP Network Addresses of all of the networks that you
can reach through that gateway, and 2) the number of hops (corresponding
to the number of gateways) that a packet passes through to reach a remote
network from the local network.  Two gateway halves count as one hop.

MPE/iX 5.5 Documentation