A layer is used to specify a collection of protocol settings for use when connecting to specific remote sites. The communication layers lists are located under:
LANconfig:
Console:
The most common protocol combinations are already predefined in the communication layers list. You should only make changes or additions if remote sites are incompatible with the existing layers. The possible options are contained in the following overview.
Note: Please note that the actual parameters for a device depend on how it is equipped. Your
device possibly does not offer all of the options described here.
| Parameter | Meaning | |
|---|---|---|
| Layer name | This name is used for selecting the layer in the list of remote sites/peers. | |
| Encapsulation | Additional types of encapsulation can be set for the data packets. | |
| 'Transparent' | No additional encapsulation | |
| 'Ethernet' | Encapsulation as Ethernet frames. | |
| 'LLC-ETH' | Ethernet via ATM with LLC encapsulation as per RFC 2684. | |
| 'LLC-MUX' | Multiplexing via ATM with LLC/SNAP encapsulation as per RFC 2684. Several protocols can be transmitted over the same VC (virtual channel). | |
| 'VC-MUX' | Multiplexing via ATM by establishing additional VCs as per RFC 2684. | |
| Layer-3 | The following options are available for the network layer: | |
| 'Transparent' | No additional header is inserted. | |
| 'PPP' | The connection is established according to the PPP protocol (in synchronous mode, i.e. bit oriented). The configuration data are taken from the PPP table. | |
| 'AsyncPPP' | Like 'PPP', but here the asynchronous mode is used instead. PPP works with characters. | |
| ‘... with script’ | All options can be executed with their own script. The script is specified in the script list. | |
| 'DHCP' | Assignment of network parameters by DHCP. | |
| Layer-2 | This field configures the upper sublayer of the data link layer. The following options are available: | |
| 'Transparent' | No additional header is inserted. | |
| 'X.75LAPB' | Connections are established with X.75 and LAPM (Link Access Procedure Balanced). | |
| 'PPPoE' | PPP information is encapsulated in Ethernet frames | |
| Options | Here you can activate the compression of transmitted data and channel bundling. These options are only come into effect if they are supported by the interfaces used and by the selected Layer 2 and Layer 3 protocols. Please refer to section ISDN channel bundling with MLPPP for further information. | |
| Layer-1 | This field configures the lower sublayer of the data link layer. Further information is available in the documentation of the setup parameters 2.2.4.6 Lay-1. | |
