Re: [ovs-discuss] IPv6 dadfailed

2015-03-09 Thread Alex Wang
Hey Tobias, Thx for providing more info, I'm only about to comment on the 'dump-flows' output. Here are what I found 'loop-like': """ skb_priority(0),in_port(p258p2),skb_mark(0/0),eth(src=00:00:5e:00:02:05,dst=33:33:00:00:00:12),eth_type(0x8100),vlan(vid=303,pcp=0),encap(eth_type(0x86dd),ipv6(s

Re: [ovs-discuss] IPv6 dadfailed

2015-03-06 Thread Tobias Brunner
Hi everyone, Thanks a lot for taking care of this issue! > This is a good point. I suspect there is a loop in the setup causing the > bounch-back. Yes, this really looks like that there is a loop somewhere. > > I cannot yet reconcile this with the previous message of the sending > > VM receivi

Re: [ovs-discuss] IPv6 dadfailed

2015-03-05 Thread Alex Wang
Hey, > > > > Running tcpdump on the two physical uplinks shows that the neighbor > > solicitation is sent out on both interfaces (Or maybe sent out on one and > > received on the other, I'm not quite sure...). > If it is the later, it makes sense that the sending VM receives it > again. Which mea

Re: [ovs-discuss] IPv6 dadfailed

2015-03-05 Thread Gurucharan Shetty
> Thanks a lot for this suggestions. We did some deeper investigation and this > is what we found out: > > After configuring an IPv6 address on the VM guest, the neighbor solicitation > message is sent out and immediately bounced back to the VM, leading to the > situation that the kernel thinks the

Re: [ovs-discuss] IPv6 dadfailed

2015-03-05 Thread Tobias Brunner
Hi, > I don't use IPv6, so I don't know the specifics, but here are some > details on how you can debug it. > > * Assuming you have just one VM, on your hypervisor, a 'ovs-vsctl > show' will show you the name of the virtual interface name (vif). So > the first thing to do is put a tcpump on that

Re: [ovs-discuss] IPv6 dadfailed

2015-01-05 Thread Gurucharan Shetty
On Fri, Dec 12, 2014 at 5:08 AM, Tobias Brunner wrote: > Hi list > > 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: mtu 1500 qlen 1000 > inet6 fe80::5054:ff:fed6:46a3/64 s

Re: [ovs-discuss] IPv6 dadfailed

2015-01-05 Thread Tobias Brunner
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: mtu 1500 qlen 1000 > inet6 fe80::5054:ff:fed6:46a3/64 scope link tentative dadfailed >valid_lft forever

[ovs-discuss] IPv6 dadfailed

2014-12-12 Thread Tobias Brunner
Hi list 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: mtu 1500 qlen 1000 inet6 fe80::5054:ff:fed6:46a3/64 scope link tentative dadfailed valid_lft forever preferred_l