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New Member

Nexus 7000 FCoE between datacenters

Hi experts,

Does anybody know what the max distance is for FCoE between datacenters?
Is there a difference between F1 and F2 linecards, considering this distance?

Thanks!

9 REPLIES
Cisco Employee

Nexus 7000 FCoE between datacenters

Hello

Currently max distance supported for lossless fabric is upto 20km with both F1/F2 cards.

Thanks

-Prashanth

New Member

Nexus 7000 FCoE between datacenters

Thanks for your reply Prashanth,

Can you please point me to some documentation about the distance limits?

Thanks,

Thomas

Cisco Employee

Nexus 7000 FCoE between datacenters

New Member

Nexus 7000 FCoE between datacenters

Hi Prashanth,

Correct me if i'm wrong, but the document states:

Maximum lossless link distance: 40km

Thanks,

Thomas

Cisco Employee

Nexus 7000 FCoE between datacenters

I see Maximum lossless link distance 20KM

New Member

Nexus 7000 FCoE between datacenters

You are right, the document says 20KM. The description on the site itself says 40KM.
Now i'm wondering which one is right.

Cisco Employee

Nexus 7000 FCoE between datacenters

Curently 20KM is what has been tested and certified.

New Member

Nexus 7000 FCoE between datacenters

I don't get this really. Nobody at Cisco can give me a definite answer without pointing me to the proper documentation.

Your colleague gives me the following details:

F1 supports 20 km with ER With 6.1 and sup2,

F2 module will support 80km with xWDM optics

Please explain why 40km is listed at the IEEE Data Center Bridging (DCB) Features on http://www.cisco.com/en/US/prod/collateral/switches/ps9441/ps9402/data_sheet_c78-605622.html

I guess this details need to be clear and accesible for everyone. How is a customer supposed to adopt FCoE, while technical requirements and limitations aren't properly listed at all?

New Member

Nexus 7000 FCoE between datacenters

Also, can anyone please explain how FCoE is supposed to work in a xWDM configuration?

Both the F1 and F2 linecards do support xWDM SFPs according to the data sheets. Both data sheets refer to

http://cisco.com/en/US/prod/collateral/modules/ps5455/ps6575/product_data_sheet09186a00801a557c.html for CWDM modules and for DWDM module to http://cisco.com/en/US/prod/collateral/modules/ps5455/ps6576/product_data_sheet0900aecd80582763.html for DWDM.

These links however only describe 1000BASE SFPs! What about 10GBASE SFPs?

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