"In early 2001, AYR Networks formed a team of software
developers experienced in networking protocols, device drivers,
high-end routing platforms, and porting of applications and tools
from the open source community.
Focusing first on the Cisco 7600 platform, AYR engineers ported
Linux to its central switch processor, route processor, high speed
WAN line cards, and distributed switching LAN line cards.
AYR then ported or developed routing protocols, a command line
interface, ASIC control daemons, line card managers, flash drivers
and filesystems, network drivers, and several more subsystems
needed to make a complete ISP-ready high-end router."