topic Re: Fabric Metrocluster - How many dark fibres? in ONTAP Discussions

Fabric Metrocluster - How many dark fibres?

Willybobs27 — Thu, 05 Jun 2025 06:12:51 GMT

I've looked at various bits of documentation and some suggest 2 dark fibre's, one for each fabric, whilst others show 4 dark fibre's one for each fabric and 2 for the FCVI cluster interconnects.

Which one is correct?

Re: Fabric Metrocluster - How many dark fibres?

aborzenkov — Fri, 04 Jan 2013 17:54:56 GMT

You need dark fibre for each remote shelf connection as well as for FC-VI port. This amounts to two optical pairs for each stack. As stacks should be mirrored, minimum that makes sense is 6 optical pairs between sites.

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Stretch Metrocluster - How many dark fibres?

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I've looked at various bits of documentation and some suggest 2 dark fibre's, one for each fabric, whilst others show 4 dark fibre's one for each fabric and 2 for the FCVI cluster interconnects.

Which one is correct?

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Re: Fabric Metrocluster - How many dark fibres?

RICCO4400 — Fri, 04 Jan 2013 18:03:15 GMT

Hi Willybobs27

If you plan to implement TI zone (Traffic Isolation) you need 4 fiber, if not 2 can be enough

Have a look to TR3548 if you want more information about TI Zone

Regard

Re: Fabric Metrocluster - How many dark fibres?

aborzenkov — Fri, 04 Jan 2013 18:10:05 GMT

So this is fabric ? Initial mail had "stretch" in subject ... Then you need indeed two or four pairs depending on traffic isolation

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Re: Fabric Metrocluster - How many dark fibres?

created by RICCO4400<https://communities.netapp.com/people/RICCO4400> in Data ONTAP - View the full discussion<https://communities.netapp.com/message/97697#97697>

Hi Willybobs27

If you plan to implement TI zone (Traffic Isolation) you need 4 fiber, if not 2 can be enough

Have a look to TR3548 if you want more information about TI Zone

Regard

Reply to this message by replying to this email -or- go to the message on NetApp Community<https://communities.netapp.com/message/97697#97697>