Hi all, > I'm trying to get IPv6 traffic to flow over the Open vSwitch, but it always > fails at assigning an IPv6 address (this is a VM, connected to Open > vSwitch): > > 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qlen 1000 > inet6 fe80::5054:ff:fed6:46a3/64 scope link tentative dadfailed > valid_lft forever preferred_lft forever > > When disabling dad, IPv6 communication works: > > sysctl -w net.ipv6.conf.eth0.accept_dad=0 > > 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qlen 1000 > inet6 fe80::5054:ff:fed6:46a3/64 scope link > valid_lft forever preferred_lft forever > > ping6 google.ch > PING google.ch(mil01s19-in-x1f.1e100.net) 56 data bytes > 64 bytes from mil01s19-in-x1f.1e100.net: icmp_seq=1 ttl=58 time=6.22 ms > 64 bytes from mil01s19-in-x1f.1e100.net: icmp_seq=2 ttl=58 time=5.16 ms > > The VM and the host are both running Ubuntu Server 14.04.1 LTS. Open vSwitch > is at version 2.0.2. On the host only libvirt and kvm is used, nothing > more... > > Any ideas why dad does not work or how I can debug this thing?
I just wanted to ask if someone has some helping hints to debug this issue? Cheers, Tobias -- VSHN AG Tobias Brunner Linux and Network Engineer
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