Peribit Opens Up the WAN

Tool eases remote bandwidth checking.

Two-year-old WAN optimization startup Peribit Networks Inc. this fall will turn its attention to application response time and larger networks, with new software and hardware for each.

The Santa Clara, Calif., company next month will add new PFA (Packet Flow Acceleration) technology to its Sequence Reducer hardware, which employs proprietary Molecular Sequence Reduction technology to compress redundant data flows crossing expensive WAN links.

PFA goes beyond the existing sequence-reduction algorithms by addressing latency in TCP for short transactions and long data flows, such as large file transfers using FTP.

For long file transfers that require fewer but longer transactions, PFA reduces the wait time for an acknowledgement from the receiver by requesting that more data be sent within a transaction.

With wait times fairly lengthy over long distances, the PFA technology promises to bring LAN-like performance to users accessing remote ERP (enterprise resource planning) applications from one continent to the next, according to Peribit user Chip Greel, architect at Finisar Corp., in Sunnyvale, Calif.

"More than two-thirds of our ERP users are across the big pond [Pacific Ocean]. If you can make it appear theyre not across the big pond when operating Oracle [Corp.], or other applications, it makes them a lot more productive," Greel said.

But Greel warned that when used with a quality-of-service technology, large data transfers could starve smaller and lower-priority applications for bandwidth. "With PFA you really have to dial in your QOS," he added.

Along with the new PFA technology, Peribit Networks in November will release a higher-end SR-80 with greater port density and capacity for central sites.

The SR-80 doubles the number of ports its high-end device supports. Along with support for 320 connections, the two-rack unit device provides a fiber-optic interface as well as a copper interface for 10/100/1,000M-bps Ethernet and includes dual, hot-swappable power supplies. The device also supports up to 45 155M-bps OC-3 links.

The benefits of Peribits Sequence Reduction compression and latency-reduction technologies may only apply, however, to private leased-line or frame relay networks, said John Morency, president of Momenta Research Inc., in Chelmsford, Mass.

The PFA software is due next month and is a free upgrade for existing customers with maintenance contracts. The SR-80 is due in November, and pricing starts at $22,500.