Version 3: http://www.tp-link.com/us/download/TL-SG108E_V3.html
Version 2: http://www.tp-link.com/us/download/TL-SG108E_V2.html
I haven't been able to determine anything other than support for fewer IGMP snooping groups in v3 vs v2 (32 vs 128). I don't believe v2 supports IPv6 and was hoping...
