The Cisco Nexus 56128P offers two slots for a Generic Expansion Modules (GEM). The GEM for the Cisco Nexus 56128P provides 24 ports 10G Ethernet/FCoE or 2/4/8G Fiber channel and 2 ports 40 Gigabit QSFP+ Ethernet/FCoE ports. The expansion module supports native 40 Gigabit Ethernet on the QSFP+ ports. The expansion module is supported on the Cisco Nexus 56128P chassis only and can be populated in either of the two expansion slots.