A fully populated CRS contains over 1000 linecards at 40 Gbit/s each and can scale to 92 Tb/s bandwidth. To maintain line speed on all interfaces, the internal bandwidth is many times this.
In both single- and multi-chassis configurations, the CRS-1 switch fabrics are based on a three-stage Beneš architecture. In a single-chassis system, the three switching stages--S1, S2, and S3--are all contained on one fabric card. In a multi-chassis system, the S2 stage is contained within the FCCs, with the S1 and S3 stages resident in the LCCs at the egress and ingress interfaces fabric plane interfaces, respectively.
While the device was in development, it was known by the code name of HFR, or Huge Fucking Router[1]. The marketing group later maintained this actually meant Huge Fast Router.[2] This code name was coined in the tradition of Cisco's previous service provider router, the GSR (12000-series), whose development code name was BFR, or Big Fucking Router. BFR even had a logo of a fist punching through a globe. On one of the fingers is a ring with the industry-standard blue router icon, and below the logo it says "BFR" on a banner. This same logo can be seen on the internals of some early GSR line cards.[3] All CRS-1 software package file names start with "hfr-" (e.g., "hfr-fpd.pie-3.4.2" is the FPGA image).
As of 2008, the CRS-1 is the largest production router in existence.
NOTE:
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headphone&earphone for computers
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