Supermicro SBM-25G-100 Blade Switch
4x 100G/40G Ethernet uplinks, 1x Gigabit Ethernet uplink
20x 25G Ethernet downlink (backward compatible to 20x10G)
SuperBlade 20-Port 25G Switch Module, includes connections to the SuperBlade's LAN interfaces. While SBM-25G-100 connects to the LAN interfaces on the mezzanine card of Blade servers