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Beginner

Cisco Nexus 40G to 1G

Hello,

We have N9K-C93108TC-EX (48 ports Copper and 6 ports QSFP)

We want to connect a FW using 1G optics so we need to "lower" the speed of the 40G.

So we bought CVR-QSFP-SFP10G and we put a Multi-mode SFP We did the breakout command:

interface breakout module 1 port 49-50 map 10g-4x

but when I issue speed 1000 we receive the following:

Ethernet1/50/1 is down (Transceiver speed does not match the speed configured on the port)

 

We are using version:

7.0(3)I4(7)

 

Does anyone knows how do I do it?

 

BR,

Omer Shtivi

1 ACCEPTED SOLUTION

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8 REPLIES 8
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Hall of Fame Expert

Hi,

The Optics you are using are 10G 10x4=40 and not 1Gig SFP.  I don't think there is a way to break down a 40Gig interface to 40x1Gig interfaces. I have not seen that.

HTH

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I understand you need only 1 1Gig but the breakout cable is only 10Gig. 

Is this the optic you are using for 1Gig?

GLC-SX-MMD

HTH

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Yes, I'm using

GLC-SX-MMD

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Works

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Great. So, NXOS-703I7.1 works for using 1Gig with a breakout cable.  Does the interface numbering stay the same as 10G? 

HTH

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Guys, Can we use 6*40G as Access port..

as I am working on a requirement where I have to connect the 10G Storage NAS Box hence I have proposed CVR-QSFP-SFP10G with SFP-10G-SR and i want to use as Access port with specific VLAN assigned to it...

 

But I come to know the 6*40G in Nexus 93108/93180 can be only use for uplink purpose as Trunk ...not as Access port...please suggest bit urgent...?

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I understood that he isn't using a breakout cable, because he mentioned CVR-QSFP-SFP10G adapter.

 

So the interface of the switch was physically converted from 40G to 10G and he can be using a OM3/OM4 fiber or single mode fiber.

 

Even with the QSFP to 10G SFP adapter, is it necessary to input the breakout command? 

 

 

 

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