From: Sheahan, John (John.Sheahan@priceline.com)
Date: Fri Sep 16 2005 - 11:00:15 GMT-3
Dark Fiber is only considered "dark" when you, the customer are required
to light it with your equipment. For instance, if you buy a managed
fiber solution from a vendor, they will use their equipment (let's say a
pair of Cisco Metro 1500's) to light the fiber and give you the hand
off.
If you buy dark fiber, it just means it's not lit yet and you could
simply attach your own Cisco Metro 1500's to it and have the same thing
as the managed solution, only you have to maintain and configure the
equipment and it could save you money in the long run.
As far as SAN goes, there are cards that you can put into the DWDM boxes
(such as the Adva 3000) that will allow you to light the dark fiber and
run fiber channel over it for storage.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Vijay Ramcharan
Sent: Friday, September 16, 2005 9:51 AM
To: ccielab@groupstudy.com
Subject: How is dark fiber used in a SAN?
I was doing some reading up on SAN technology and I came across the use
of dark fiber to extend SAN connections. My understanding of dark fiber
is that it's unused (dark=no light).
So if it's used in a SAN, it is no longer dark fiber. Am I correct?
Is "dark fiber" required for extending a SAN since it carries no other
type of frame, Ethernet for example?
Vijay Ramcharan, CCIE #14824, CCDP, MCSE
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