Date: Wed, 6 Jan 2021 10:19:09 +0700 From: Victor Sudakov <vas@sibptus.ru> To: freebsd-net@freebsd.org Subject: Re: FreeBSD does not reply to IPv6 Neighbor SolicitationsNUD Message-ID: <20210106031909.GA39200@admin.sibptus.ru> In-Reply-To: <00d901d6e382$5c3db590$14b920b0$@donnerhacke.de> References: <00d901d6e382$5c3db590$14b920b0$@donnerhacke.de>
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[-- Attachment #1 --] Lutz Donnerhacke wrote: > > $ ifconfig re1 > > re1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 > > > options=8209b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,WOL_MAGIC,LI > NKSTATE> > > ether c4:12:f5:33:c9:7c > > inet 192.168.170.5/24 broadcast 192.168.170.255 > > inet6 fe80::c612:f5ff:fe33:c97c%re1/64 scopeid 0x2 > > inet6 2001:470:ecba:3::5/64 > > media: Ethernet autoselect (1000baseT <full-duplex>) > > status: active > > nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL> > > There is another possibility: The address could be in a tentative or > duplicate state. > In such a state the device SHOULD/MUST NOT respond to solicitation messages. > > This can be caused by a "proxy arp/nd" device, which responds to an address > in > the local neighbour cache with its own solication message. It might be even > a loop. > We had such cases in the past, so that the device does not activate the IPv6 > address without disabling the NUD (was a windows server). For fixed > addresses it > should be save to disable the flag. > > But this state should be reported by ifconfig. I expect it should. > > So, did you try the latest stable? Not yet. When the situation occurs again, I'll turn on net.inet6.icmp6.nd6_debug=0xff as Bjoern A. Zeeb has suggested, maybe I'll see something useful. Then I'll think of updating the system. -- Victor Sudakov, VAS4-RIPE, VAS47-RIPN 2:5005/49@fidonet http://vas.tomsk.ru/ [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- iQEcBAEBAgAGBQJf9SwtAAoJEA2k8lmbXsY0VTUIAKOdNyw0ZAby8jPwvOUMmdCg ICCChOz1PjorVJZiNtf3yGWitswYjXu5kNo60wrltr4LC1XWdICKgKTOUkAuDNPb WDHp7GqtPz2maoFPZOPQsL3M6fLXiO8YLDy9Y7PCIga6uKhMjPGBMnWZnT0+BZ5T 4UiJw5HTLsc0amR+ykIdOe7vzQ0STB5mckq6i8JYKCr6XD4Vl08ZJSTcB3GbIEiG SzCeGTzgrotDx7ED13oUS/0exsPuRM2jTOvnZ3BUx3wDrCd9wTgiZXcWznBS8Yyi ep5KMubXvNcjKQVT+ljay8UNyKhjVsJgJQCAeNEETiZA4pQYpJlBAHXmk9xvJuA= =GiMJ -----END PGP SIGNATURE-----
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