... double upstream data rates 3.Built-in 4-port Switch network device adsl2 routerSoftware Specification ADSL FeaturesFull-rate ANSI T1. ... snoopingIGMP multicastPort VLANTag VLANIEEE 802.1d transparent learning bridgingRouting FeaturesClassical IP and ARP over ATM (RFC 1577/2225), MER, RIP ... V1/V2Static routing, IP, TCP, UDP, ARPNAT, NAPT, DNS, DDNS, DHCP ServerUPnP, ...