C
ONFIGURATION
S
ETTINGS
3-9
Asynchronous Transfer Mode (ATM)
ADSL provides a reliable connection to your service provider. Traffic is
carried over the ADSL physical link layer using ATM protocol. This
protocol allows you to designate multiple paths between locations (Virtual
Path), and multiple data channels within each path (Virtual Channel).
Eight
ATM Permanent Virtual Circuits (PVCs) are provided.
Just set the VPI
(Virtual Path Indicator) and VCI (Virtual Channel Indicator) for each PVC
to the values provided by your ISP. For home use, usually only one
connection will be configured.
Protocol Encapsulation
Traffic passing over the ADSL connection must be encapsulated into a
recognized ATM protocol. (Data is segmented into short fixed length cells
when entering the ATM stream, and reassembled into variable length user
information when leaving the stream). The Barricade router supports the
following protocols:
• PPPoA VC-Mux. Point to Point Protocol over ATM Virtual Circuit
Multiplexer (null encapsulation) allows only one protocol running per
virtual circuit (less overhead).
Automatic
Reconnect
Automatically reestablishes connection as
required for any client application.
DHCP Dynamic Host Configuration Protocol.
DHCP client enable Configures the barricade’s IP address via
DHCP.
Host Name Your ISP may require you to enter a host
name here.
Virtual Circuit The virtual connection that the WAN
settings on this page configure.
1. The static address is not used if “DHCP client enable” is selected.
2. See “Protocol Encapsulation” below.
3. See “Protocol Multiplexing” on page 3-11.
Parameter Default Description