With a layer, a collection of protocol settings are defined, which should be used when connecting to specific remote stations. The list of the communication layers can be found under:
LANconfig: Communication / General / Communication layers
WEBconfig: LCOS menu tree / Setup / WAN / Layer-list
In the communication layer list the common protocol combinations are already predefined. Changes or additions should only be made when remote stations are incompatible to the existing layers. The possible options are contained in the following list.
Note: Please note that the parameters located in LANCOM depend upon
the functionality of the unit. It is possible that your unit does not
offer all of the options described here
.
| Parameter | Meaning | |
|---|---|---|
| Layer name | The layer is selected in the peer list under this name. | |
| Encapsulation | Additional encapsulations can be set for data packets. | |
| 'Transparent' | No additional encapsulations. | |
| 'Ethernet' | Encapsulation in the form of ethernet frames. | |
| 'LLC-MUX' | Multiplexing via ATM with LLC/SNAP encapsulation according to RFC 2684. Several protocols can be transmitted over the same VC (Virtual Channel). | |
| 'VC-MUX' | Multiplexing with ATM by establishing additional VCs according to RFC 2684. | |
| Layer-3 | The following options are available for the switching layer or network layer: | |
| 'Transparent' | No additional header is inserted. | |
| 'PPP' | The connection is established according to the PPP protocol (in the synchronous mode, i.e. bit-oriented). The configuration data are taken from the PPP table. | |
| 'AsyncPPP' | Like 'PPP', only the asynchronous mode is used. This means that PPP functions character-oriented. | |
| '... with script' | All options can be run with their own script if desired. The script is specified in the script list. | |
| 'DHCP' | Assignment of the network parameters via DHCP. | |
| Layer-2 | In this field the upper section of the security layer (Data Link Layer) is configured. The following options are available: | |
| 'Transparent' | No additional header is inserted. | |
| 'PPPoE' | Encapsulation of the PPP protocol information in ethernet frames. | |
| 'PPPoE' | The PPP negotiation runs via Ethernet. The PPP packets are encapsulated in Ethernet frames for this purpose. This process is frequently used for DSL connections. | |
| Options | Here you can activate the compression of the data to be transmitted and the bundling of channels. The selected option only becomes active when it is supported by both the ports used and the selected Layer-2 and Layer-3 protocols. For further information see section . | |
| Layer-1 | In this field the lower section of the security layer (Data Link Layer) is configured. The following options are available: | |
| 'AAL-5' | ATM adaptation layer | |
| 'ETH-10' | Transparent Ethernet as per IEEE 802.3. | |
| 'HDLC' | Securing and synchronization of the data transfer as per HDLC (in the 7 or 8-bit mode). | |
| 'V.110' | Transmission as per V.110 with a maximum of 38,400 bps. | |
| Modem | Modem transmission (requires Fax Modem option) | |