we found out it was a polarity issue, sapped the sides of the cable. never thought this issue still exists  
i tried to connect the two but there is no link   dell side:  dell branded ftlx8571d3bcl 13-06 850nm LN#50 6/2007 Non-qualified pluggable media present, SFP+ type is 10GBASE-SRMedium rate is unknown, Wavelength is 850nm   cisco have: transceiver is presenttype is 10Gbase-SRname is CISCO-FINISARpart number is FTLX8571D3BCL-C2revision is Aserial number is FNS1534256Lnominal bitrate is 10300 MBit/secLink length supported for 50/125um OM2 fiber is 82 mLink length supported for 62.5/125um fiber is 26 mLink length supported for 50/125um OM3 fiber is 300 mcisco id is 3cisco extended id number is 4cisco part number is 10-2415-03cisco product id is SFP-10G-SRcisco vendor id is V03
cant connect Dell force 4810 with cisco 3127 over sfp+