> More evidence - the description claims it uses the RTL8139D and RTL8305SB > chipsets. The RTL8139D chipset is obviously the NIC, the RTL8305B chipset is > a five port switch: > > http://www.realtek.com.tw/products/products1-2.aspx?modelid=18
In the end my couriousity won and I acquired one of these. Works out of the box, appears as a single NIC to OpenBSD: rl0 at pci0 dev 10 function 0 "Realtek 8139" rev 0x10: irq 10 address 00:e0:4c:09:1f:50 rlphy0 at rl0 phy 0: RTL internal phy -- ach