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High-end access routers run real-time BSD

Jan 31, 2005 — by Henry Kingman — from the LinuxDevices Archive — views

Juniper Networks used a real-time POSIX core from FSMLabs, along with BSD, in a line of service routers for branch offices. The J-series Service Router line runs RTCore BSD, along with Juniper's BSD-based “JunOS” operating environment, ensuring high QoS (quality-of-service) even on congested networks, Juniper says.

(Click for larger view of J-series routers)

The BSD version of FSMLabs's RTCore uses the same POSIX real-time core as the Linux version, instead running BSD as its idle task. RTCore first supported BSD kernels in May, 2002.

According to FSMLabs, RTCore lets real-time software run “at the performance levels of the underyling hardware.” FSMLabs says RTCore has been used in routers, satellite control, telescopes, jet engine test stands, and high performance graphical displays. It says the patented technology eliminates the need to configure and tune embedded OS performance.

Juniper Networks describes JunOS as a feature-rich, six-year-old operating system used “in the top 25 carrier networks in the world.” Juniper's J-series routers bring JunOS to less demanding networks, such as small sites, remote offices, and branch locations.

According to Juniper, the J-series devices boast high security, thanks in part to a console port enabling administrators to contol the device even while under attack. Additional features include a modular, fault-protected design, high levels of QoS (quality-of-service) control, and advanced local and remote administration capabilities.


Juniper's J-series service routers are available now in several configurations that support from one to “Nx” T1/E1 or DS3 lines.

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