Date: Sat, 15 Apr 2023 08:36:51 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=270859 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: email@example.com When I am using the mce driver with srv-io enabled I get the following message: 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 : sudo sysctl net.inet6.ip6.dad_count=0 While the work around work I would really prefer to kepp this dupicate address check. Is there anything that can be done? 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-specific 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="myhost.domain.tld" keymap="fr.macbook.kbd" ifconfig_mce0="mtu 9000 up" ifconfig_mce0_ipv6="inet6 .../64" ipv6_defaultrouter="...::1" sshd_enable="YES" ntpd_enable="YES" # Set dumpdev to "AUTO" to enable crash dumps, "NO" to disable dumpdev="AUTO" zfs_enable="YES" bastille_enable="YES" iovctl_files="/etc/iov/mce0.conf" vm_enable="YES" vm_dir="zfs:zdata/vms" ``` Some google research shows thatthis error is triggered when two ifconfig 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) -- You are receiving this mail because: You are the assignee for the bug.