Passive cable to connect FET-40G and FET-10G

[Jevgeni Rõžov]

Hello,

I will get straight to the topic. The Cisco Nexus 2348TQ have an uplink SKU option N2K-F40G-F10G, which consists of the following:

2xFET-40G transceiver (with MPO-12 connector)

8xFET-10G transceiver (with LC connector)

One could possibly assume, that there should be two "1xMPO12 male > 4xLC female" passive breakout cables included with the bundle, but the tricky part is that there is no cables included and I am unable to find any mentions of such articles being available from Cisco.

The question itself is whether the cisco have such passive breakout cables available and if so - what are their SKUs?

Halp? Please? This one is driving me mad already..

[Philip D'Ath]

Check out:

http://www.cisco.com/c/en/us/products/collateral/interfaces-modules/transceiver-modules/data_sheet_c78-660083.html

Cisco QSFP-4SFP10G-CU (1M, 3M, 5M)	QSFP to 4 SFP+ copper break-out cables	-
Cisco QSFP-4X10G-AC (7M, 10M)

QSFP-4X10G-AOC (1M, 2M, 3M, 5M, 7M, 10M)

QSFP to four SFP+ active optical breakout cables

[Jevgeni Rõžov]

Thank you very much for the answer Philip, but all of the items you have listed are active cables, meaning that they already come with transceivers.

My question was how do you connect the transceivers included in the N2K-F40G-F10G bundle, not what the replacement cables could be.

[Philip D'Ath]

Oops sorry.  I haven not seen cables like that.  I've only seen transceiver ones.

[Mark Sparling]

               When you select N2K-F40G-F10G when you do a configuration for Nexus 2300 and in the output you get FET10G & FET40G.  So how do you connect them together because one is a 10Gbps and the other is 40Gbps, different cables and connectors right.  So the question is if I have a parent switch of Nexus 5548UP/9372PX/9396PX all having SFP+ for access ports and the child switch is Nexus 2348TQ with QSFP uplinks.  I selected N2K-F40G-F10G under the Nexus 2348TQ what else do I/they need?

Answer:

• They would install the FET-40G in the uplinks of Nexus C2348 and then install the FET-10G to the parent switch. They would then have to buy a MPO breakout cable like - MPO to 4 x SFP LC for a third party vendor.
• The FET-10G is only supported in the uplink ports if it’s used with the CVR-QSFP-SFP10G as adapter. Notice that the C2348T, only has QSFP uplinks ports, so the FET-10G itself cannot be used without the adapter.
• This is an example of 40-Gbps Cabling Deployment Solutions with Cisco Nexus 9000 Series Switches - http://www.cisco.com/c/dam/en/us/products/collateral/switches/nexus-9000-series-switches/white-paper-c11-729384.pdf
• Example of MPO breakout cable - http://www.panduit.com/wcs/Satellite?c=Page&childpagename=Panduit_Global%2FPG_Layout&cid=1345564329011&packedargs=item_id%3DFXTHP5NLSQNF015%26locale%3Den_us&pagename=PG_Wrapper

[Jevgeni Rõžov]

So, to answer my question and skip the irrelevant part - Cisco does not offer a passive MPO12>4xLC breakout cable. You need to order it from a third-party vendor.

However, it would be great if someone from cisco staff could confirm this.

[Mark Sparling · Accepted solution]

Yes, that is correct.