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Administration for Network Connectivity
CID: 77730 555-233-504 — Issue 1 — April 2000
262
Data Module — Type
ethernet
Use the ethernet data module type to define an interface between port 17 on the
C-LAN board and the LAN. This data module associates a link number and extension
number with the C-LAN port address.
Common Fields See Common Data Module Fields (256) for descriptions of fields on this screen that
are not listed below.
Network uses 1’s for
broadcast addresses?
This field allows you to specify whether the DEFINITY system is to use all 1’s or all
0’s in the host ID to form broadcast addresses sent on the network by this C-LAN
board.
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DATA MODULE
Data Extension: 2377 Name: ethernet on link 2
Type: ethernet
Port: 01c0817_
Link: 2
Network uses 1’s for broadcast addresses? y
Valid
Entries
Usage
y/n
default is y
Leave the default (y) if the private network contains only
DEFINITY switches and adjuncts. Set to n only if the network
includes non-DEFINITY switches that use the 0’s method of
forming broadcast addresses, as described below.
The binary form of a broadcast address is most commonly formed by
combining the (sub)network portion with all 1’s for the host portion
of the address. However, some non-DEFINITY older systems form
broadcast addresses using 0’s instead of 1’s in the host portion.
These systems usually recognize a received broadcast message as
such only if the message address is formed using the 0’s method.
For a broadcast message received, the C-LAN board recognizes
either form as a broadcast address and therefore accepts (looks at)
the message. For a broadcast message sent, the C-LAN board uses
the 1’s method if this field is set to y and uses the 0’s method if this
field is set to n.
If one or more nodes in the network is a non-DEFINITY switch that
uses the 0’s method, then every DEFINITY switch in the network
that wishes to broadcast to these 0’s-method switches must set this
field to n.