CHAPTER 6: Applications
91
6.2.1 C
ONCENTRATOR
C
ONFIGURATION FOR
NAT
This section describes using the Remote Access Concentrator’s Local Management utility to configure the
Concentrator for the example NAT application shown earlier in
Section 6.2
. Because we’re using values other
than the Concentrator’s defaults for Line Build Out and switch type, configuration involves both the utility’s
Module Configuration menu
and
its Network Tools interface. Note that the Local Management utility doesn’t
support mice; use the keyboard’s up- and down-arrows or its tab key to navigate through the utility’s fields.
Here’s what the procedure would be for our hypothetical network:
1. From Local Management utility’s Module Menu, select Network Tools. The Network Tools command
prompt will appear.
2. To set the switch type from NI-2 (the Concentrator’s default) to 5ESS, enter the command
isdn switchtype ESS5
3. To set the Line Build Out value from 0.0 dB (the Concentrator’s default) to -15.0 dB
on both of the WAN (WIDE AREA) ports, enter the commands
wanl1p linebuildout -15.0dB 1
wanl1p linebuildout -15.0dB 2
where “1” at the end of the first command represents the WIDE AREA 1 port and the “2” at the end of
the second command represents the WIDE AREA 2 port. Both commands
must
be entered in order to
make the change on both interfaces.
4. Because the Concentrator’s defaults for the other line-information values are acceptable for this
application, we can enter the
exit
command to return to the Module Menu.
5. From the Module Menu, select Module Configuration.
6. From the Module Configuration menu, first select Authentication Settings.
7. Provide the CSM Secret (“CSM_sec”) for the CSM service.
8. Provide the Concentrator’s System Name (“Conc_LRA3”), System Secret (“LRA3_sec”), and System
Password (“LRA3_pw”). These values correspond to the values we will enter on the CSM.
9. Select Save, and then Return, to go back to the Module Configuration menu.
10. Next, select General Configuration.
11. Provide date and time information.
12. Provide the Concentrator’s host IP address (2.2.2.1) and subnet mask (255.0.0.0), which correspond to
the values we’ll enter on the CSM. We do not need to enter a default gateway, since the CSM is on the
same subnet as the Concentrator.
11. Verify information, then click Save.
At this point, the Concentrator will automatically reboot.
