Configuring ATM Networks

This article describes how to configure Linux-based PCs and an asynchronous transfer mode (ATM) switch to build on ATM network.
Testing the Connections

Once the Classical IP setup is complete, all of the standard network tests can be performed. The simplest test is done by using the ping command to test the connection. One difference between SVC and PVC connections is a large latency for the first ping response when using SVCs. The reason for the latency is the setup time needed to establish the SVC. After the SVC is established, the latency for SVC and PVC connections should be the same.

After verifying the basic connectivity, you can run some network performance tests over the ATM connection. I have used the Netperf tool (see Resources) as well as some benchmarks developed locally. The maximum throughput performance is very good, around 132Mbps. This number is close to the maximum payload data rate for an OC-3 ATM network.


I have given instructions needed to set up the switch and hosts on an ATM network with Linux. The configuration steps given are specific to IP over ATM connections using the Classical IP standard. In addition to Classical IP, LAN Emulation (LANE) can be used to carry IP over ATM. LANE is supported by the Linux-ATM software as well, but configuration of LANE is beyond the scope of this article. For more information, refer to the documentation in the Linux-ATM distribution.

Hosts can communicate in several other ways using an ATM interface without relying on Classical IP. The ATM software supports “native” ATM sockets, where applications can communicate directly over an ATM connection, bypassing the IP software completely.

If you are interested in learning about ATM technology but don't have ATM hardware, the Linux-ATM software can be of help. The software has the capability to emulate an ATM device using TCP/IP to make the actual connection. By taking advantage of this support, you can get a head start on configuring ATM for Linux and learning the ATM programming interface.



Wayne J. Salamon is a Computer Scientist in the High Performance Systems and Services Division at the National Institute of Standards and Technology in Gaithersburg, MD. He has worked on system software for PCs, UNIX workstations and IBM mainframes for the past 12 years. When not doing computer stuff, he appears to play guitar, though only when connected to vacuum tube amplifiers. Wayne can be reached at



Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.


Anonymous's picture

nice. one i like this.

White Paper
Linux Management with Red Hat Satellite: Measuring Business Impact and ROI

Linux has become a key foundation for supporting today's rapidly growing IT environments. Linux is being used to deploy business applications and databases, trading on its reputation as a low-cost operating environment. For many IT organizations, Linux is a mainstay for deploying Web servers and has evolved from handling basic file, print, and utility workloads to running mission-critical applications and databases, physically, virtually, and in the cloud. As Linux grows in importance in terms of value to the business, managing Linux environments to high standards of service quality — availability, security, and performance — becomes an essential requirement for business success.

Learn More

Sponsored by Red Hat

White Paper
Private PaaS for the Agile Enterprise

If you already use virtualized infrastructure, you are well on your way to leveraging the power of the cloud. Virtualization offers the promise of limitless resources, but how do you manage that scalability when your DevOps team doesn’t scale? In today’s hypercompetitive markets, fast results can make a difference between leading the pack vs. obsolescence. Organizations need more benefits from cloud computing than just raw resources. They need agility, flexibility, convenience, ROI, and control.

Stackato private Platform-as-a-Service technology from ActiveState extends your private cloud infrastructure by creating a private PaaS to provide on-demand availability, flexibility, control, and ultimately, faster time-to-market for your enterprise.

Learn More

Sponsored by ActiveState