SMC Networks SMC7904BRA - Manual (Page 67)

C
ONFIGURING THE
B
ARRICADE
ADSL R
OUTER
4-22
ATM Interface
1483 Bridging
Enter the Bridging settings provided by your ISP.
Parameter Description
VPI/VCI Data flows are broken up into fixed length cells,
each of which contains a Virtual Path Identifier
(VPI) that identifies the path between two nodes,
and a Virtual Circuit Identifier (VCI) that identifies
the data channel within that virtual path. Each
virtual circuit maintains a constant flow of cells
between the two end points. When there is no data
to transmit, empty cells are sent. When data needs
to be transmitted, it is immediately inserted into
the cell flows.
Encapsulation Shows the packet encapsulation type.
Packet encapsulation specifies how to handle
multiple protocols at the ATM transport layer.
• VC-MUX: Point-to-Point Protocol over ATM
VirtualCircuit Multiplexer (null encapsulation)
allows only one protocol running per virtual
circuit with less overhead.
• LLC: Point-to-Point Protocol over ATM
Logical Link Control allows multiple protocols
running over one virtual circuit (using slightly
more overhead).
QoS Class ATM QoS classes including CBR, UBR and VBR
PCR/SCR/MBS QoS Parameters - PCR (Peak Cell Rate), SCR
(Sustainable Cell Rate) and MBS (Maximum Burst
Size) are configurable.