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Fri, 14 Nov 2025 02:41:40 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 5AE2fe51024234 for virtualization@FreeBSD.org; Fri, 14 Nov 2025 02:41:40 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: virtualization@FreeBSD.org Subject: [Bug 262292] Seemingly not possible for IPv6 to function over tap devices on if_bridge Date: Fri, 14 Nov 2025 02:41:41 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: bhyve X-Bugzilla-Version: 13.0-STABLE X-Bugzilla-Keywords: bhyve, ipv6 X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: brad@facefault.org X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: virtualization@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="UTF-8" X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated List-Id: Discussion List-Archive: https://lists.freebsd.org/archives/freebsd-virtualization List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: freebsd-virtualization@freebsd.org Sender: owner-freebsd-virtualization@FreeBSD.org MIME-Version: 1.0 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D262292 --- Comment #11 from Brad Ackerman --- (In reply to ivy from comment #10) So the problem is that I'm not quite figuring out how to share a /64 with t= he jails. I've got a /64 from which I'd like to assign both jails and the host= ; if I remove the address from the host's external interface NDP on the bridge starts working =E2=80=94=C2=A0but telling ifconfig that the prefixlen is 12= 8 on all the global-scope addresses (and then setting up a far gateway on the jail) does= n't seem to make a difference. jails: flags=3D1008843 met= ric 0 mtu 1500 options=3D0 ether 58:9c:fc:10:80:39 inet 172.21.188.1 netmask 0xfffffc00 broadcast 172.21.191.255 inet6 fe80::5a9c:fcff:fe10:8039%jails prefixlen 64 scopeid 0x4 inet6 2604:2dc0:200:2116::ff:ffff prefixlen 64 id 00:00:00:00:00:00 priority 32768 hellotime 2 fwddelay 15 maxage 20 holdcnt 6 proto rstp maxaddr 2000 timeout 1200 root id 00:00:00:00:00:00 priority 32768 ifcost 0 port 0 member: e0a_powerdns flags=3D143 ifmaxaddr 0 port 8 priority 128 path cost 2000 groups: bridge nd6 options=3D21 e0a_powerdns: flags=3D1008943 me= tric 0 mtu 1500 description: vnet0 host interface for Bastille jail powerdns options=3D8 ether 02:57:e9:cd:fc:0a groups: epair media: Ethernet 10Gbase-T (10Gbase-T ) status: active nd6 options=3D29 Inside jail, the other side of the epair: vnet0: flags=3D1008843 met= ric 0 mtu 1500 options=3D8 ether 02:57:e9:cd:fc:0b inet6 2604:2dc0:200:2116::4 prefixlen 64 inet6 fe80::57:e9ff:fecd:fc0b%vnet0 prefixlen 64 scopeid 0x9 groups: epair media: Ethernet 10Gbase-T (10Gbase-T ) status: active nd6 options=3D21 $ sudo tcpdump -nvvve -i jails tcpdump: listening on jails, link-type EN10MB (Ethernet), snapshot length 262144 bytes 02:13:07.789039 02:cb:b3:d7:b8:0b > 33:33:ff:ff:ff:ff, ethertype IPv6 (0x86= dd), length 86: (hlim 255, next-header ICMPv6 (58) payload length: 32) 2604:2dc0:200:2116::4 > ff02::1:ffff:ffff: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has 2604:2d c0:200:2116::ff:ffff source link-address option (1), length 8 (1): 02:cb:b3:d7:b8:0b 0x0000: 02cb b3d7 b80b=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20 02:13:08.789166 02:cb:b3:d7:b8:0b > 33:33:ff:ff:ff:ff, ethertype IPv6 (0x86dd), length 86: (hlim 255, next-header ICMPv6 (58) payload length: 32) 2604:2dc0:200:2116::= 4 > ff02::1:ffff:ffff: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, = who has 2604:2d c0:200:2116::ff:ffff=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20 source link-add= ress option (1), length 8 (1): 02:cb:b3:d7:b8:0b 0x0000: 02cb b3d7 b80b 02:13:09.816291 02:cb:b3:d7:b8:0b > 33:33:ff:ff:ff:ff, ethertype IPv6 (0x86= dd), length 86: (hlim 255, next-header ICMPv6 (58) payl oad length: 32) 2604:2dc0:200:2116::4 > ff02::1:ffff:ffff: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has 2604:2dc0:200:2116::ff:fff= f=20=20=20 =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20 source link-address option (1), length 8 (1): 02:cb:b3:d7:b8:0b 0x0000: 02cb b3d7 b80b=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20 02:13:15.163167 02:cb:b3:d7:b8:0b > 33:33:ff:ff:ff:ff, ethertype IPv6 (0x86dd), length 86: (hlim 255, next-header ICMPv6 (58) payload length: 32) 2604:2dc0:200:2116::= 4 > ff02::1:ffff:ffff: [icmp6 sum ok] ICMP6, neighbor solicitation, length 32, = who has 2604:2d c0:200:2116::ff:ffff=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20 source link-add= ress option (1), length 8 (1): 02:cb:b3:d7:b8:0b=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20 0x0000: 02cb b3d7 b80b --=20 You are receiving this mail because: You are the assignee for the bug.=