On Fri, 2014-10-03 at 11:36 -0400, Chuck Anderson wrote: > I'm not sure if this is a kernel thing or a NetworkManager thing. Did > something change in how IPv6 router advertisements are handled by > NetworkManager in Fedora 20?
I think it's a NetworkManager thing. We'll fix it. Dan > On my Fedora 20 system, the Link MTU option recevied from IPv6 router > advertisements is not being applied to the interface configuration: > > kernel-3.16.2-200.fc20.x86_64 > NetworkManager-0.9.9.0-44.git20131003.fc20.x86_64 > > >cat /proc/sys/net/ipv6/conf/wlp2s0/mtu > 1500 > > On my Fedora 19 system, this is working: > > kernel-3.14.18-100.fc19.x86_64 > NetworkManager-0.9.8.8-2.fc19.x86_64 > > >cat /proc/sys/net/ipv6/conf/p4p1/mtu > 1480 > > In both cases, the RA has the Link MTU option: > > >sudo rdisc6 -1 wlp2s0 > Soliciting ff02::2 (ff02::2) on wlp2s0... > > Hop limit : 64 ( 0x40) > Stateful address conf. : No > Stateful other conf. : No > Mobile home agent : No > Router preference : medium > Neighbor discovery proxy : No > Router lifetime : 300 (0x0000012c) seconds > Reachable time : unspecified (0x00000000) > Retransmit time : unspecified (0x00000000) > Prefix : 2001:xxxx:xxxx:1::1/64 > On-link : Yes > Autonomous address conf.: Yes > Valid time : 300 (0x0000012c) seconds > Pref. time : 300 (0x0000012c) seconds > MTU : 1480 bytes (valid) > Source link-layer address: 68:7F:74:xx:xx:xx > from fe80::6a7f:74ff:fexx:xxxx > > I need this option because my IPv6 router uses a HE.net tunnel which > adds 20 bytes of overhead for the 6in4 encapsulation, and many sites > break PMTUD which causes those sites to hang. > _______________________________________________ > networkmanager-list mailing list > [email protected] > https://mail.gnome.org/mailman/listinfo/networkmanager-list _______________________________________________ networkmanager-list mailing list [email protected] https://mail.gnome.org/mailman/listinfo/networkmanager-list
