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Connectivity between UCS 6249 - UCS 6248 Switches and 10GB iscsi on EMC Storage - VNXe 3200

Sami AlSawaftah



I am trying to check VNXe 3200 Connectivity with SFP+ ( Cisco UCS 6249 - UCS 6248 Switches )


will the 10 GB iscsi fiber / Copper connect directly to the UCS 6248 and what is the type of Cables ?


will SFP and SFP+ connect to each other or that will cause some issues?


i tried to search the EMC side but getting difficulty to get the Document showing the Comparability but expecting soon so wanted to check from Cisco side


I know this is the Guide to refer to


but please help me finding answers



3 Replies 3

Walter Dey

Hi Sami

has the answer

EMC does not support Passive Twinaxial cables in an iSCSI or FCOE environment.
EMC only supports Active Twinaxial cables in an iSCSI or FCOE environment.

We currently support EMC, Brocade and Cisco cables.

SFP-H10GB-ACU7M and SFP-H10GB-ACU10M are active twinax cables

see might also be useful.








VNXe 3200 has new iscsi modules


New Hardware I/O modules

  • 4 port 1Gbps iSCSI 10GbaseT (copper) – negotiates to 10Mbps, 100Mbps, or 1000 Mbps
  • 4 port 10Gbps iSCSI optical module – supports 10GbE SFP or Active and Passive Twin-Ax Cables



so do we need to have the optical module to connect to UCS 6248  ?

Hi Sami

Important: iSCSI should use 10G Ethernet, 1G is not enough for a server.

The cheapest method is using Twinax-cables (it seems quite new, that EMC now also supports passive ones); they are available at 1/3/5/7 meters. No need for additional transceivers, as they are part of the cable.

If you require bigger distances, you have to go with optical SFP+, requireing a SPF+ transceiver on the VNX and UCS FI.

Hope that helps


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