Hello TechNet, I have a very confusing problem: We have a little Wireless LAN at home with a Mac and 2 laptops running XP (Lenovo Thinkpads). Everybody's connected via 802.11n to a TP-Link TL-WR841N router which goes to the network via a PPPoE link over ADSL with an ECI router. So far so good. Yesterday I upgraded one of the XP laptops to Windows 7 x64 Ultimate, and suddenly the whole house started getting thrown off the net (that is, the PPPoE link crashes). It seems to be related to high-throughput TCP connections since I've been able to play a few hours of TF2 (which uses UDP) on this same setup without a crash... I've tried disabling IPv6 and turning off all of the Windows 7 TCP bells and whistles (netsh interface tcp set global...), still no dice - as soon as I try to do something heavy over TCP (for example, download a large file over HTTP), the PPPoE connection breaks. The router log has this: 167 Aug 9 10:10:17 sent [PADI Host-Uniq(0x0000063f)] 168 Aug 9 10:10:22 sent [PADI Host-Uniq(0x0000063f)] 169 Aug 9 10:10:32 sent [PADI Host-Uniq(0x0000063f)] 170 Aug 9 10:11:03 Timeout waiting for PADO packets 171 Aug 9 10:11:08 sent [PADI Host-Uniq(0x00000664)] 172 Aug 9 10:11:08 rcvd [PADO AC-Name:25-9C065010300083 AC-MAC:00:30:88:01:da:8b] 173 Aug 9 10:11:08 sent [PADR Host-Uniq(0x00000664)] 174 Aug 9 10:11:08 rcvd [PADS sess-id(7485)] 175 Aug 9 10:11:08 sent [LCP Req mru=1480 magic=0xc3822e7c] 176 Aug 9 10:11:08 rcvd [LCP Req mru=1492 auth=pap magic=0x21125c2c] 177 Aug 9 10:11:08 sent [LCP Ack mru=1492 auth=pap magic=0x21125c2c] 178 Aug 9 10:11:08 rcvd [LCP Ack mru=1480 magic=0xc3822e7c] 179 Aug 9 10:11:08 sent [PAP AuthReq user="yossefor@tau" password=(hidden)] 180 Aug 9 10:11:08 sent [LCP code=0xc] 181 Aug 9 10:11:08 rcvd [LCP CodeRej] 182 Aug 9 10:11:09 rcvd [LCP Req auth=pap magic=0xc5e68bbf] 183 Aug 9 10:11:09 LCP down 184 Aug 9 10:11:09 LCP down 185 Aug 9 10:11:09 sent [LCP Req mru=1480 magic=0xde774ef4] 186 Aug 9 10:11:09 sent [LCP Ack auth=pap magic=0xc5e68bbf] 187 Aug 9 10:11:09 rcvd [LCP Nak mru=1500] 188 Aug 9 10:11:09 sent [LCP Req magic=0xde774ef4] 189 Aug 9 10:11:09 rcvd [LCP Ack magic=0xde774ef4] 190 Aug 9 10:11:09 sent [PAP AuthReq user="***" password=(hidden)] 191 Aug 9 10:11:09 sent [LCP code=0xc] 192 Aug 9 10:11:09 rcvd [PAP AuthAck ""] 193 Aug 9 10:11:09 sent [IPCP Req addr=0.0.0.0 dns1=0.0.0.0 dns3=0.0.0.0] 194 Aug 9 10:11:09 rcvd [IPCP Req addr=132.66.8.10] 195 Aug 9 10:11:09 sent [IPCP Ack addr=132.66.8.10] 196 Aug 9 10:11:09 rcvd [IPCP Nak addr=132.66.237.97 dns1=132.66.17.135 dns3=132.66.17.137] 197 Aug 9 10:11:09 sent [IPCP Req addr=132.66.237.97 dns1=132.66.17.135 dns3=132.66.17.137] 198 Aug 9 10:11:09 rcvd [IPCP Ack addr=132.66.237.97 dns1=132.66.17.135 dns3=132.66.17.137] 199 Aug 9 10:11:14 PPPoE connected

Hi, Thank you for your post. Based on my research, I would like to suggest trying the following to check the issue: 1. Do you mean that the PPPOE connection drops, when the Windows 7 computer is on? If you turn off this Windows 7 computer, does it work? 2. Just as a check, if you bypass the router and establish the PPPOE directly, will the connection work? 3. You may also update your NIC driver for the Windows 7 computer and upgrade the routers firmware. Hope this helps. Thanks.Nicholas Li - MSFT