ATM Component Description

The asynchronous transfer mode (ATM) component contains networking support using ATM devices. There are four ATM communication modes:

Using local area network (LAN) emulation, known as ATMLANE. This is the mode typically used in corporate LANs.
Using Ethernet-permanent virtual circuit (PVC), known as ATMEPVC. This is used in certain ATM-DSL deployments.
Using Classical Internet Protocols (IP) over ATM, known as ATMARPC and ATMARPS. This is an alternative LAN technique suitable for IP-only networks.
Using Winsock over raw ATM connections. This is used for special purpose applications .

Component Configuration

ATMLANE, ATMARPC, ATMARPS and Winsock do not require configuration when used over ATM.

The following table shows the settings for Ethernet-PVC configurations.

Property/setting name	Default setting	Description	Property example	Setting example
VPI	0	The virtual path identifier for the PVC on which the driver operates.	VPI	1
VCI	0	The virtual circuit identifier for the PVC.	VCI	100
Encap	2	Defines the encapsulation used for data transfer. Possible values are: 0 – IPv4 1 – IPv4 LLC/SNAP 2 – Ethernet 3 – Ethernet LLC/SNAP	Encap	1

Property/setting name

Default setting

Description

Property example

Setting example

VPI

The virtual path identifier for the PVC on which the driver operates.

VPI

VCI

The virtual circuit identifier for the PVC.

VCI

100

Encap

Defines the encapsulation used for data transfer. Possible values are:

0 – IPv4

1 – IPv4 LLC/SNAP

2 – Ethernet

3 – Ethernet LLC/SNAP

Encap

ATM networks commonly use only one of the four possible operation modes listed above.

For more information on ATM technology, see this Microsoft Web site.