User`s manual

2000591-001 Data Communications Setup •• 51
Editing the Address Translation Table
The Advance Network Gateway (ANG) monitors the “local” ADH bus for
messages with a “remote” destination address. The ANG determines if
the message destination is “remote” by searching it’s Address
Translation Table (ATT). If the destination address is located remotely,
the ANG_DN encapsulates the ADH message within the data portion of
an IP packet and sends the message out the Ethernet port.
The Address Translation Table (ATT) records all known units that reside
on the Advance Data Hiway (ADH). Each record within the ATT contains
an ADH Loop / Unit number and the IP address of the ANG the unit is
directly connected to. The ATT records are automatically added or
updated each time an ADH broadcast is received. Each ANG broadcasts
it’s ATT every 10 minutes. This insures the data intgerity of all ATT
tables. An uninitalized ATT is automatically updated after 10 minutes by
receiving ADH broadcasts and ANG_DN ATT broadcasts.
Only Advance analyzer units broadcast on a periodic basis so it may be
necessary to add other type units when a new ANG is added. An
alternate method of updating the ATT is to force all ADH units to send a
power-up broadcast by pressing the reset button or cycling the power.
The following procedure assumes that the Windows Hyper Terminal pro-
gram residing on your PC has been configured, the ANG_DN is opera-
tional and the PC is connected to the ANG_DN.
If you are editing the translation tables for an Advance Network Gateway
DataNET always disconnect the crossover link cable that connects the
two ANCB's before editing any tables. Remember that if you edit the
channel A designated ANCB, you must also edit the assigned channel B
ANCB.
Overview
Table Description
Important
Before You Begin
Important DataNET
Gateway Users