Hi Philipp, Attached is my pcap from Wireshark.
My subnet is: 2a00:f10:10a:5::/64 RX-8 #1: 2a00:f10:010a:5::1 RX-8 #2: 2a00:f10:010a:5::2 Anycast: 2a00:f10:010a:5::3 My client: 2a00:f10:010a:5:0:1337:6:79 If you check the pcap file, it seems that the RX is responding incorrect, isn't it? As you can see, the ::3 address is working fine on the internet (You can ping it), but not in the local network. Is this a bug in RX-8? Regards, Wido On Tue, 2010-11-30 at 18:24 +0100, Philipp Geschke wrote: > Hello, > > On Tue, 30 Nov 2010 15:36:20 +0100, Wido den Hollander <[email protected]> > wrote: > > When analyzing the traffic with Wireshark I see that the RX-8 responds > > to the ND with it's unicast address, the ::2 in this case. > > Depending on what you mean this is a wrong behaviour. > The router MUST respond with it's UNIcast address as source address (as > anycast addresses must not be the source address of an IPv6 packet, see > RFC > 3513 section 2.6) but the Target field of the ICMP message MUST be the > Target field of the Neighbor solicitation that prompted the advertisement > (See RFC2461 Section 4.4). If you specified the anycast address as the > gateway this should be the anycast address. > > So a correct Neighbor Solicitation for an IPv6 anycast address with a > Linux client that has ::10 would basically look like this: > > Client: Source ::10, Target field ::3 > Router: Source ::2, Target field ::3 > > This would work with Linux, at least tested with Debian. > > What NI MLX does is: > > Client: Source ::10, Target field ::3 > Router: Source ::2, Target field ::2 > > This will not work and is a bug. I have opened a bug report with Brocade > and it's a confirmed defect. > > If you want, send me a pcap or tcpdump output of your Neighbor > Solicitation and I will tell you what the RX does wrong. > > > Strange thing is, a Windows 2k3 machine works fine with the anycast > > address as it's default gateway. > > I have no working knowledge of IPv6 behaviour of Windows, so I really > can't tell you why it is working. :( > > > Regards, > Philipp > > >
bond0.pcap
Description: application/extension-pcap
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