User Guide| LQ Series 4.0
9.4 Link-local environments
9.4.1 What is link-local?
A link-local address is an IP address within the local segment of any network.
Routers do not pass information to these as link-local addresses are not
guaranteed to be unique beyond a single network segment. When first connected to
a network, your LQ device will attempt to get an IP address via Dynamic Host
Configuration Protocol (DHCP).๎ If no DHCP server is available the unit will
automatically enter link-local IP mode. A link-local IP address will take the form:
169.254.xxx.xxx.
9.5 Accessing an LQ unit when in link-local mode
To access the CCM of an LQ unit in link-local, you must connect to it from a PC that
is also in link-local mode.
Devices will revert to link-local mode if they are configured to DHCP and fail to find
a DHCP address on the network or device they are attempting to connect to. A PC
can be put into link-local mode by ensuring it is in DHCP mode and connecting it to
the LQ unit that is in link-local with a standard Ethernet cable. The PC will look for a
dynamically generated IP address (DHCP), and when it does not find one will enter
link-local mode automatically.
Once the PC is connected to the LQ and in link-local mode, you can connect to your
LQ unit by opening a browser window on the computer and inputting the unitโs IP
address (from the front panel display) into the address field. This takes you to the
Core Configuration Manager where you can configure the device as usual.
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