Hi Juliusz, On Tue, May 03, 2022 at 08:18:07PM +0200, Juliusz Chroboczek wrote: > So the multicast packet overtook the unicast one. That's probably due to > neighbour discovery delaying the unicast packet. Could you please provide > the timestamps?
I don't think it is ND. I started noticing this when I enabled fq_codel on my Debian systems so I have a hunch it's because of the more fancy per-flow queueing which it does. Was the MAC stuff ever tested on any openwrt systems? Those have had fq_codel by default for a while now. Debian only recently switched to it in unstable. I'm attaching a filtered down pcap from the receiving side showing the problem. Wireshark filter: (babel && ipv6.src == fe80::1) || icmpv6. The sending side is running babeld the receiving side bird2 if that matters. > Daniel, how often does it happen? Very frequently. AFAICT the neighbour never gets assigned anything better than the infintiy metric so it's unusable. Thanks, --Daniel
babel-mac-reorder.pcap
Description: application/vnd.tcpdump.pcap
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