Hello, i´m using IPv6 with my Fritz!Box 7270 router. IPv6 connectivity is provided by Sixxs with prefix 2001:6f8:1dc0::/48. However access to IPV6 or dual stack nodes in the internet only work for 24 hours. This is the output of ipconfig /all directly after a reboot. Beschreibung. . . . . . . . . . . : Intel(R) 82566DC-2 Gigabit Network Connection Physikalische Adresse . . . . . . : 00-1D-09-18-6E-D6 DHCP aktiviert. . . . . . . . . . : Ja Autokonfiguration aktiviert . . . : Ja IPv6-Adresse. . . . . . . . . . . : 2001:6f8:1dc0:0:21d:9ff:fe18:6ed6(Bevorzugt) IPv6-Adresse. . . . . . . . . . . : fd15:dac1:18f:621b:21d:9ff:fe18:6ed6(Bevorzugt) Tempor„re IPv6-Adresse. . . . . . : 2001:6f8:1dc0:0:79e8:c083:2294:cf59(Bevorzugt) Tempor„re IPv6-Adresse. . . . . . : fd15:dac1:18f:621b:79e8:c083:2294:cf59(Bevorzugt) Verbindungslokale IPv6-Adresse . : fe80::21d:9ff:fe18:6ed6%11(Bevorzugt) IPv4-Adresse . . . . . . . . . . : 192.168.9.254(Bevorzugt) Subnetzmaske . . . . . . . . . . : 255.255.255.0 Lease erhalten. . . . . . . . . . : Samstag, 22. Januar 2011 07:39:12 Lease l„uft ab. . . . . . . . . . : Samstag, 22. Januar 2011 07:49:12 Standardgateway . . . . . . . . . : fe80::21f:3fff:fe4e:5457%11 192.168.9.99 DHCP-Server . . . . . . . . . . . : 192.168.9.1 DHCPv6-IAID . . . . . . . . . . . : 234888457 DHCPv6-Client-DUID. . . . . . . . : 00-01-00-01-12-74-E0-26-00-1D-09-18-6E-D6 DNS-Server . . . . . . . . . . . : fd15:dac1:18f:621b:21f:3fff:fe4e:5457 192.168.9.1 192.168.9.99 Prim„rer WINS-Server. . . . . . . : 192.168.9.1 NetBIOS ber TCP/IP . . . . . . . : Aktiviert After about 24 hours both ipv6 adresses with the official prefix are discarded and nothing helps to reactivate them (ipconfig /renew doesn´t help). The only think i can do is to reactivate the network adapter and acticate it again. After the discard, access to ipv6 dual stacks nodes still works but with lnng delays. Verbindungsspezifisches DNS-Suffix: jetsys.de Beschreibung. . . . . . . . . . . : Intel(R) 82566DC-2 Gigabit Network Connection Physikalische Adresse . . . . . . : 00-1D-09-18-6E-D6 DHCP aktiviert. . . . . . . . . . : Ja Autokonfiguration aktiviert . . . : Ja IPv6-Adresse. . . . . . . . . . . : fd15:dac1:18f:621b:e844:2bba:b760:b218(Bevorzugt) Temporäre IPv6-Adresse. . . . . . : 2001:6f8:1dc0:0:382c:163:d23d:8372(Verworfen) IPv6-Adresse. . . . . . . . . . . : 2001:6f8:1dc0:0:e844:2bba:b760:b218(Verworfen) Temporäre IPv6-Adresse. . . . . . : fd15:dac1:18f:621b:382c:163:d23d:8372(Bevorzugt) Verbindungslokale IPv6-Adresse . : fe80::e844:2bba:b760:b218%11(Bevorzugt) IPv4-Adresse . . . . . . . . . . : 192.168.9.254(Bevorzugt) Subnetzmaske . . . . . . . . . . : 255.255.255.0 Lease erhalten. . . . . . . . . . : Donnerstag, 20. Januar 2011 15:48:21 Lease l„uft ab. . . . . . . . . . : Samstag, 22. Januar 2011 07:38:26 Standardgateway . . . . . . . . . : fe80::21f:3fff:fe4e:5457%11 192.168.9.99 DHCP-Server . . . . . . . . . . . : 192.168.9.1 DHCPv6-IAID . . . . . . . . . . . : 234888457 DHCPv6-Client-DUID. . . . . . . . : 00-01-00-01-12-74-E0-26-00-1D-09-18-6E-D6 DNS-Server . . . . . . . . . . . : fd15:dac1:18f:621b:21f:3fff:fe4e:5457 192.168.9.1 192.168.9.99 Prim„rer WINS-Server. . . . . . . : 192.168.9.1 NetBIOS ber TCP/IP . . . . . . . : Aktiviert is this an issue with the windows 7 ipv6 networking stack or do i better open a call with the vendor of my router?

Hi, As a test, please check DHCP server settings and update your network card driver to see how it works. In meantime, for IP v6 issue, we have the corresponding forum to support this protocol; it is recommended to post to the forum: IPv6 Forum The reason why we recommend posting appropriately is you will get the most qualified pool of respondents, and other partners who read the forums regularly can either share their knowledge or learn from your interaction with us. Thank you for your understanding. Alex ZhaoPlease remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.