B: DHCP Support and APIPA
44 Verint Video Solutions
At startup, an edge device searches for a valid IP network configuration. The device
requires this configuration prior to starting its functions. The network configuration for
Nextiva devices consists of:
An IP address
A subnet mask
A gateway
The device first looks in its local memory. If no configuration is found, it tries to contact a
DHCP server. If DHCP configuration fails—if the device does not find a server or if it cannot
get a configuration from it within one minute—the device assigns itself temporary network
settings based on the APIPA addressing scheme. This scheme allows a device to find a
unique IP address until it receives a complete network configuration, either manually or
from a DHCP server.
A device in APIPA mode does not reside on the same subnet as the other devices on the IP
network; therefore, it may not be able to see them or be visible to them. Devices use the
following temporary APIPA configuration:
IP address: 169.254. *. *
Subnet mask: 255.255.0.0
Gateway: 169.254. *. *
The *. * portion is based on the MAC address of the device.
A device is in APIPA mode:
The first time it boots up
After receiving a duplicate IP address
After a hardware reset
When the DHCP server does not have any available IP addresses
DHCP configuration is automatically disabled:
After a firmware upgrade
After a factory reset
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