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̈ Chapter 7: Routing and WAN connections LANCOM Reference Manual LCOS 3.50
91
Routing and WAN
connections
7.6 Establishing connection with PPP
LANCOM routers also support the point-to-point protocol (PPP). PPP is a
generic term for a whole series of WAN protocols which enable the interaction
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 proto-
col (in the synchronous mode, i.e. bit-oriented). The con-
figuration 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 con-
figured. 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 ’Channel bundling with
MLPPP’ →page 101.
Layer-1 In this field the lower section of the security layer (Data Link Layer) is con-
figured. 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)
Parameter Meaning