beautypg.com

Wan 4-21 – SMC Networks Barricade SMC7404BRA EU User Manual

Page 46

background image

WAN

4-21

VPI/VCI

Virtual Path Identifier (VPI) and Virtual Circuit

Identifier (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

Specifies how to handle multiple protocols at the

ATM transport layer.

VC-MUX. Point to Point Protocol over

ATM Virtual Circuit 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

(uses slightly more overhead.)

Idle Time (Minute)

Enter the maximum idle time for the Internet

connection. After this time has been exceeded the

connection will be terminated.

ISP Name

Choose the ISP to whom this connection will

apply.

Parameter

Description