LL2M

A basic pre-requisite for all methods device configuration is for an IP connection to exist between the configuration computer and the device. No matter whether you use LANconfig, WEBconfig or SSH; it is impossible to send any configuration commands to the device without an IP connection. In the event of erroneous configuration of the TCP/IP settings or VLAN parameters, this IP connection may be impossible to establish. In these cases, the only help is to reset the device to its factory default settings. This option requires physical access to the device, which may not always be possible with concealed access point installations and may mean a considerable overhead for large-scale installations.

The LANCOM Layer 2 Management Protocol (LL2M) is used to also enable configuration access to a device even without an IP connection. All this protocol requires is a connection on layer 2 (i.e. via Ethernet directly or via layer-2 switches) to establish a configuration session. LL2M connections are supported on LAN or WLAN connections, but not via WAN. Connections via LL2M are password protected and are resistant to replay attacks.

LL2M establishes a client-server structure for this purpose: The LL2M client sends requests or commands to the LL2M server, which then responds to the requests or runs the commands. Both the LL2M client and the LL2M server are integrated in LCOS LX. The LL2M client commands are executed via the command line or WEBconfig.

An encrypted tunnel is set up for every LL2M command to protect the transmitted log-in information. To use the integrated LL2M client, start a terminal session on a device that has local access to the LL2M server via the available physical medium (LAN, WLAN). In this CLI session you can use the following commands to contact the LL2M server: LL2Mdetect and LL2Mexec. See 1.6 Command-line interface – command summary.

The menu contains the settings for LANCOM layer 2 management.