Configuring and Managing Host-Based X.25 Links - Edition 6 (36939-90057)

Configuring DTCs Step-by-Step
Modify the Network Management Configuration File
Chapter 3
91
Step 14: Configure X.25 System-to-System LUG
NMMGR displays the DTC X.25 Card Configuration — Sys-to-Sys LUGs screen
(Figure 3-14) if you press the
[Go To SysLUG]
key at the DTC X.25 Card Configuration
screen or the DTC X.25 Card Configuration — Level 3 & Miscellaneous screen. On this
screen, you specify information for X.25 system-to-system Local User Groups.
A System-to-System Local Users Group filters calls between remote systems and local
LAN-based systems. If the list exists only those remote systems that are listed can have
access to local LAN-based systems. If there are no items in the LUG list, there is no
control on incoming and outgoing calls on the DTCs X.25 board. Remote systems can be
allowed incoming-call setup only, outgoing-call setup only, or two-way call setup. Note
that this list is referred to only for call setup; once a call is set up, data can be exchanged
in both directions. If all systems are to be permitted both incoming and outgoing calls
only, you do not need to create an LUG list. The LUG can screen for incoming calls only,
outgoing call only, or both. if you list any systems as IN, be sure that you list all. The
same applies to systems listed as OUT or IN/OUT.:
Figure 3-14 DTC X.25 Card Configuration — Sys-to-Sys LUGs Screen
1. Move the cursor to the first Address field under Enter remote X.25 addresses
and security. Enter the X.25 address of a system that will be able to establish a
system-to-system connection with the HP 3000 Series 900 you are configuring.
2. Move the cursor to the Sec. field next to the address you just entered. Enter the
security level for connections between the remote X.25 address and the system you
are configuring. Possible values are IN (accept calls from the address), OU (send calls
to the address), and IO (accept calls from and send calls to the address).