LOYTEC L-IP User Manual

L-IP User Manual 152 LOYTEC
Version 6.1 LOYTEC electronics GmbH
only a subset of the services of the device. For example, the WLAN interface could
expose the Web UI, but not BACnet communication.
 Access point mode (separate network): In the isolated access point mode, a
client can connect to the wireless network created by the device. The device will
assign an IP address to the client and will redirect all traffic to itself. This mode is
used to configure a device with a mobile device.
 Access point mode (bridged): In the bridged access point mode, a client can
connect to the access point and also can use the network devices on the bridged
Ethernet device. In this mode, the DHCP server is deactivated to avoid interference
with an existing DHCP server in the Ethernet network.
 Mesh point (separate network): This mode is used to create an IEEE 802.11s
mesh network. Mesh points communicate with other mesh points in their radio
vicinity and automatically choose the best route. Mesh networks can be used to
extend the range of a wireless network or to create redundant radio links.
 Mesh point (bridged): This mode is like the mesh point mode and also bridges the
mesh point to an Ethernet network. Thus devices in the Ethernet network can
communicate with devices in the mesh network. Only one mesh point should be in
the bridged mode to avoid network loops.
The LWLAN-800 interface can use two WLAN functions at the same time. This can be
used for advanced setups, like:
 Wireless 1 is used as an access point for configuring the device, while the
Wireless 2 interface is used to participate in a mesh network.
 Wireless 1 is used as a bridged access point for configuring the device and the
devices on the Ethernet network while Wireless 2 connects to another wireless
network to reach a remote device.
However, there are restrictions when using both interfaces at the same time:
 Both functions need to use the same radio band.
 Both functions need to use the same channel.
11.5.2 802.11s Mesh Networking
WLAN client and access point modes are similar to other devices using 802.11 wireless
networks. This section explains the features and benefits of the 802.11s network.
A mesh network removes the roles of clients and access points. Every node in a mesh
network can send and receive data, as in a normal wireless network. However, every mesh
node also routes packets to other mesh nodes. It observes the signal strength to all reachable
nodes and distributes this information to other mesh nodes. Thus, the mesh network can
transmit data between nodes with are not in their radio vicinity. In this case, a path between
sender and receiver is selected and the intermediate nodes transmit the packet over several
hops.
As the signal strenght and thus the range of a node can change over time, as well as nodes
can be added and removed, the best path can change. The 802.11s routing protocol takes
this into account and changes paths dynamically.
802.11s also provides strong encryption using the AuthSAE (Simultaneous Authentication
of Equals) protocol, so that each pair of mesh nodes use an encrypted link. It is resistant to
passive, active and dictionary attacks, given a strong pre-shared key.

LOYTEC L-IP Specifications

General

Brand	LOYTEC
Model	L-IP
Category	Network Router
Language	English