how to connect nexus to a core switch

[Eng-amr-rashad]

a customer has 50 servers and wants to connect them to the network through 10G Copper . i found that it can be done through CAT6A cable and connect the servers to a nexus 3172 switch but the Problem is how can i connect the 40G uplinks of the nexus to a switch like 4500-6500-6800-3850

[Philip D'Ath]

You can get a 40Gb to 4 x 10Gb cable, and then you can plug into ordinary 10Gbe ports.

You can get 40Gbe ports on the 6880.  I *think* there is a 3850 model now with 40Gbe ports - but if you are serious about aggregated 40Gbe links I would be going straight for a 6880.

[Eng-amr-rashad]

Thanks a lot for your reply but the problem is that 40Gb to 4 x 10Gb cable is not compatible with 3850 with the 40GBE



there is no 40G ports on 6880

[Mathias Garcia · Accepted solution]

Cisco's data sheet claims "Up to 20x 40 Gigabit Ethernet ports" on the 6880-X

http://www.cisco.com/c/en/us/products/collateral/switches/catalyst-6880-x-switch/data_sheet_c78-728228.html

[Philip D'Ath]

If you use the 40GB to 4 x 10Gb cable on your Nexus switch you can then plug the 10Gb ends into your Cisco 3850.  You just need to get the 10Gbe module for the 3850.

[Eng-amr-rashad]

This is cable isnot compatible with 3850 series 

[Philip D'Ath]

What about if you use the C3850-NM-2-40G module?

http://www.cisco.com/c/en/us/td/docs/interfaces_modules/transceiver_modules/compatibility/matrix/40GE_Tx_Matrix.html

Search for 3850.

It also looks to me like the Nexus 40Gbe to 4 x 10Gbe passive cables are supported (as you can plug the 10Gbe ends into the 3850 10Gbe ports) - but I'll defer to your knowledge.

[Eng-amr-rashad]

what is the difference between QSFP-H40G-CU1M= and QSFP-4SFP10G-CU1M=

[Philip D'Ath]

http://www.cisco.com/c/en/us/td/docs/interfaces_modules/transceiver_modules/installation/note/OL_24862.html

QSFP-H40G-CU1M

Cisco 40GBASE-CR4 QSFP+ passive direct-attach copper transceiver module assembly, 1 meter

Sounds like a 40GB to 40Gbe cable.

QSFP-4SFP10G-CU1M

Cisco 40GBASE-CR4 QSFP+ to 4 10GBASE-CU SFP+ passive direct-attach copper transceiver assembly, 1 meter

Sounds  like a 40Gbe to 4 x 10Gbe cable.

[Eng-amr-rashad]

Special Thanks