Connect Nexus 3548 to Nexus 6001 with QSFP-4SFP10G-CU5M

[szilard.matyas1]

Hi Gents, 

I connected Nexus 3548 and Nexus 6001 with QSFP-4SFP10G-CU5M in between them with the aim of  having 40GBASE-CR4 without success.

N3548: n3500-uk9.6.0.2.A1.1f.bin

N6001: n6000-uk9.6.0.2.N2.4.bin

N3548 release notes does not mention QSFP-4SFP10G-CU5M at all, but the datasheet says this:

Table 3. Cisco Nexus 3500 Platform 40 Gigabit Transceiver Support Matrix

Part Number	Description
SFP-10G-SR	10GBASE-SR SFP+ module (multimode fiber [MMF])
SFP-10G-LR	10GBASE-LR SFP+ module (single-mode fiber [SMF])
QSFP-4SFP10G-CU1M	QSFP to 4 x SFP 10-Gbps passive copper splitter cable, 1m (Twinax cable)
QSFP-4SFP10G-CU3M	QSFP to 4 x SFP 10-Gbps passive copper splitter cable, 3m (Twinax cable)
QSFP-4SFP10G-CU5M	QSFP to 4 x SFP 10-Gbps passive copper splitter cable, 5m (Twinax cable)

If someone is aware of the truth, please, let me know.

Kind regards,

Szilard

[Reza Sharifi]

Hi,

If you are trying to go between 2 switches using a 40Gig Twinax cable try this:

QSFP-H40G-CU5M

I have used it to connect Nexus 6ks together with no issues.

HTH

[HCTTrading]

Hi Reza,

I believe the issue is not connecting two 6Ks its connecting a 3548 with a 6K. The 3548 has only 48x10G ports and the  N6K has 48x10G and 4 QSFP port. According to Cisco's website it states that the 3548 can be logical configured for 40G (e.g (E1/-4 or E1/5-8, etc) using QSFP-4SFP10G-CU5M.

[Reza Sharifi]

Hi,

Ok, thanks for the clarification.  I understand now. So the 3548 has only 10Gig ports and no 40G interfaces. That is why Szilard is trying to use QSFP-4SFP10G-CU5M cable.

So it appears that the 3548 switch does not have any uplink ports. Does that mean any other port can and should be used for uplinks?

[neeraj]

Hi Team,

Can anyone suggest if N3548 support 10G classic transceivers (SFP-10G-LR-S=)?

Regards,

Neeraj