User's Manual

Chapter 3: 9150 Main Configuration
Redundancy
46 Teklogix 9150 Wireless Gateway User Manual
Alias IP Address
This parameter contains the alias IP address, identical for both this and the other
9150 in the redundancy system. The primary 9150 presents the alias IP address to
the network, as well as its own unique IP address. The secondary 9150 only presents
its unique IP address to the network.
When the secondary 9150 becomes the primary, it starts to use the alias IP address
as well as its unique address, while the other 9150 stops using the alias IP address.
Wireless devices in the system which communicate directly with the Teklogix
network controller’s IP address, such as terminals using TCP Direct, may communi-
cate with the alias IP address. They will then communicate with whichever of the
two redundant 9150s is the primary.
This address must be the same on both the primary and secondary 9150.
The default address is 0.0.0.0.
Note: The Alias IP address cannot be the same as the Backup IP address
(page 45).
Arbiter 1 IP Address
This parameter contains the address of a device on the network which is known to
be reliable. Both 9150s ping this device; if they receive no reply, they ping Arbiter 2
if so configured (see page 46), otherwise they assume that the network is not operat-
ing. This address should be the same on both the primary and secondary 9150s.
Arbiter 1 must always be configured when Redundancy is enabled. The default
value is the loop-back address 127.0.0.1.
Arbiter 2 IP Address
This parameter contains the address of an optional second device on the network
which is known to be reliable. Both 9150s ping this device if they receive no reply
from Arbiter 1. If they receive no reply from Arbiter 2, they assume that the network
is not operating. This address should be the same on both the primary and secondary
9150s. If the default address is configured, Arbiter 2 won’t be used in the protocol.
The default address is 0.0.0.0.