Date: Sat, 15 Apr 2023 08:36:51 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 270859] dmesg message: mce0: a looped back NS message is detected during DAD Message-ID: <bug-270859-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D270859 Bug ID: 270859 Summary: dmesg message: mce0: a looped back NS message is detected during DAD Product: Base System Version: 13.2-RELEASE Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: benoitc@enki-multimedia.eu When I am using the mce driver with srv-io enabled I get the following mess= age: mce0: a looped back NS message is detected during DAD for fe80:2::2c79:38ff:fe0d:f9e. Another DAD probes are being sent. wich is repeated until I am using the command line :=20 sudo sysctl net.inet6.ip6.dad_count=3D0 While the work around work I would really prefer to kepp this dupicate addr= ess check. Is there anything that can be done?=20 Looking at the dmesg log I can see it is happening when the interface goes first down then up: ``` mlx5_core0: <mlx5_core> mem 0xc0000000-0xc00fffff at device 2.0 on pci0 mlx5: Mellanox Core driver 3.7.1 (November 2021)mlx5_core0: WARN: mlx5_init_once:962:(pid 0): Unable to find vendor specific capabilities mlx5_core0: WARN: mlx5_fwdump_prep:94:(pid 0): Unable to find vendor-specif= ic capability, error 2 mce0: Ethernet address: 2e:79:38:0d:0f:9e mce0: link state changed to DOWN Trying to mount root from zfs:zroot/ROOT/default []... lo0: link state changed to UP mce0: link state changed to UP ``` or another type of message: ``` mce0: Ethernet address: 9c:dc:71:4c:84:f0 mce0: link state changed to DOWN mce1: Ethernet address: 9c:dc:71:4c:84:f1 mce1: link state changed to DOWN mce0: link state changed to UP mce0: a looped back NS message is detected during DAD for fe80:4::9edc:71ff:fe4c:84f0. Another DAD probes are being sent. ``` rc.conf is pretty straightforward for now: ``` hostname=3D"myhost.domain.tld" keymap=3D"fr.macbook.kbd" ifconfig_mce0=3D"mtu 9000 up" ifconfig_mce0_ipv6=3D"inet6 .../64" ipv6_defaultrouter=3D"...::1" sshd_enable=3D"YES" ntpd_enable=3D"YES" # Set dumpdev to "AUTO" to enable crash dumps, "NO" to disable dumpdev=3D"AUTO" zfs_enable=3D"YES" bastille_enable=3D"YES" iovctl_files=3D"/etc/iov/mce0.conf" vm_enable=3D"YES" vm_dir=3D"zfs:zdata/vms" ``` Some google research shows thatthis error is triggered when two ifconfig=20 command on the interface are done quickly one after the other: https://network.nvidia.com/pdf/prod_software/Mellanox_FreeBSD_Release_Notes= _3.0.0.pdf I'm using updated HPE rebranded card (so with their firmware) --=20 You are receiving this mail because: You are the assignee for the bug.=
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