Fibre Channel over Gigabit WAN Ethernet without FCIP possible?

Fibre Channel over Gigabit WAN Ethernet without FCIP possible?
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Subject Author Date
Fibre Channel over Gigabit WAN Ethernet without FCIP possible? Sparket 06-29-2007
Posted by Sparket on June 29, 2007, 7:33 am
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Hi group, I have a general understanding question. We have a SAN and
we need to extend it to a second location via a 1GB WAN-Ethernet
circuit. All my research brought back to use the FCIP feature of the
McData or MDS900 switches and then route the traffic via IP. I dont
like this idea beacause of all the issues with overhead and buffer
tweaking that need occur to proper run that architecture.

Isnt it possible to kind of bridge the FC traffic over the ethernet
without using IP? The speed of the FC and the ethernet WAN is the
same.

I found also there is a FCoE (Fibre Channel over Ethernet) specs in
the works, but this will take some more time to be established.

Am I thinking in the wrong direction, or are there maybe devices on
the market which allows me to do what I have described?

Dark fibre is no option in that place, otherwise we would have used
that for FC transport.

Thanks, Greetings, Jo


home networking made easy, greater protection, less stress, introducing nm 5.0, 728x90
Posted by anoop on June 29, 2007, 10:45 am
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> Isnt it possible to kind of bridge the FC traffic over the ethernet
> without using IP? The speed of the FC and the ethernet WAN is the
> same.

It is technically possible but the logistics are not that simple.
FCIP runs over TCP which takes care of loss/error recovery
within the IP network. If you ran FC directly over Ethernet
it would most likely be lossy. There is also no standard
for establishing FC communication directly over Ethernet
- think end node discovery and other fabric services.

> I found also there is a FCoE (Fibre Channel over Ethernet) specs in
> the works, but this will take some more time to be established.
>
> Am I thinking in the wrong direction, or are there maybe devices on
> the market which allows me to do what I have described?

I don't think there are any devices that you can buy today that
run FC directly over Ethernet.

Anoop


Posted by Sparket on June 29, 2007, 11:34 am
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Thanks Anoop, for the clarification! Greets, Jo


Posted by Michelot on June 29, 2007, 4:32 pm
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Hi Jo,

Why won't you use FC directly over SDH in the WAN, through the GFP
adaptation which is part of SDH.

For 1 Gbit/s you have VC-4-7v. How far is the storage location from
the source?

Regards,
Michelot


Posted by stephen on June 30, 2007, 8:05 am
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> Hi group, I have a general understanding question. We have a SAN and
> we need to extend it to a second location via a 1GB WAN-Ethernet
> circuit. All my research brought back to use the FCIP feature of the
> McData or MDS900 switches and then route the traffic via IP. I dont
> like this idea beacause of all the issues with overhead and buffer
> tweaking that need occur to proper run that architecture.

if you have a metro Gigabit link it may support F/channel directly.

A lot of metro DWDM can be set to support either - eg the Adva FSP2000s
which are used by various carriers for this in the UK.

same may be true for some SDH kit.
>
> Isnt it possible to kind of bridge the FC traffic over the ethernet
> without using IP? The speed of the FC and the ethernet WAN is the
> same.
>
> I found also there is a FCoE (Fibre Channel over Ethernet) specs in
> the works, but this will take some more time to be established.
>
> Am I thinking in the wrong direction, or are there maybe devices on
> the market which allows me to do what I have described?
>
> Dark fibre is no option in that place, otherwise we would have used
> that for FC transport.
>
> Thanks, Greetings, Jo
>
--
Regards

stephen_hope@xyzworld.com - replace xyz with ntl



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