While 40Gb Ethernet is an emerging technology, there are many options. To increase the number of available 10Gb ports, use QSFP+ DAC Break Out Cables to split out each 40Gb port and connect up to four 10Gb SFP+ external ports.
QSFP+ 40GBASE-SR optical transceiver
While 40Gb Ethernet is an emerging technology, there are many options. To increase the number of available 10Gb ports, use QSFP+ DAC Break Out Cables to split out each 40Gb port and connect up to four 10Gb SFP+ external ports.
IBM 40GBASE-SR4 QSFP+, Fiber optic, 40000 Mbit/s, QSFP, 50/125,62.5/125 µm, SR, 150 m
IBM 40GBASE-SR4 QSFP+. SFP transceiver type: Fiber optic, Maximum data transfer rate: 40000 Mbit/s, Interface type: QSFP. Certification: MSA