First-ever end-to-end optical traffic grooming with CRS-3

One of the exciting new features of the recently launched CRS-3 router enables Service Providers to implement first-ever all-optical end-to-end traffic grooming. One of the new linecards (unfortunately not compatible with CRS-1 due to increased hardware complexity) supports the SFSS protocol (defined in RFC 4824).

Using a high-quality video link and all-optical spatial separators you can easily transport more than one SFSS instance on the same wavelength, allowing you to implement a true sub-lambda traffic grooming in the optical domain. There’s just one gotcha: due to the encoding requirements of SFSS, you cannot carry it in the dense channel spacing of DWDM; you have to use CWDM or even wider optical bands depending on the receiver’s capabilities.

4 comments:

  1. Thats seems to be good :)

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  2. Is the traffic grooming backward-compatible with RFC2549? Hopefully it can at least help monitor those older links.

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  3. Ivan Pepelnjak02 April, 2010 06:59

    Oh my, that’s a tough one. While traffic grooming is definitely implementable on RFC 2549-based networks, those networks use a completely different physical domain and the transponders performing avian-to-optical conversion are not available yet.

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  4. I've been hearing of great strides in that optical transponder technology lately, with quad-porro prisms, Advanced Fusion Hybrid quantum transmission, PC-3 phase coating.. and don't forget XTR.

    http://www.bushnell.com/products/binoculars/elite/

    (note: I do not work for, nor do I endorse any products from, the company referenced by the URL)

    They seem ideal for monitoring RFC2549 carrier and non-carrier frames alike. Grooming really isn't too much of a concern, since those frames sort of groom themselves ;)

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Ivan Pepelnjak, CCIE#1354, is the chief technology advisor for NIL Data Communications. He has been designing and implementing large-scale data communications networks as well as teaching and writing books about advanced technologies since 1990. See his full profile, contact him or follow @ioshints on Twitter.