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Technical Notes






ImageStream Technology


ImageStream's core technologies include the Enterprise Linux™ router distribution, the SAND™ driver component architecture, and a standards-based implementation of the virtual router redundancy protocol (VRRP). These
technologies make it possible for ImageStream to deliver today's most powerful Linux routers for as little as half the price of more expensive brands.


1. ImageStream Linux

The Enterprise Linux software distribution is provided with all
ImageStream routers. The distribution includes ImageStream's networking
driver component technology for Linux called SAND. The Enterprise Linux
distribution is comprised of both Open Source and commercial software, and
the commercial source code is available to developers under ImageStream's
OEM software license.


ImageStream developed the Inetics technology platform to provide a new driver component architecture for Linux, coupled with an tightly integrated Linux kernel, and management software to make it all work together. The Inetics platform was designed to solve many of the problems associated with WAN driver design and development. The list below includes some of the advantages of using the Inetics platform, which includes the Inetics Driver Component Architecture (IDCA)

3. Virtual Router Redundancy Protocol (VRRP)

ImageStream's VRRP daemon is an RFC 2338-compliant Virtual Router
Redundancy Protocol (VRRP) implementation. VRRPd is designed to eliminate
the single point of failure inherent in static default routed LAN
environments by automatically providing alternate router paths.


4. SoftCell™ ATM and IMA

ImageStream's SoftCell™ ATM and IMA components for the SAND driver
architecture make it possible to use the router's host CPU to process ATM
cells and IMA traffic without the need for dedicated ATM chipsets. This
approach reduces the cost of ATM interface cards, and makes it possible to
run any protocol on any port at any time.