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Zeeb" To: Lexi Winter cc: freebsd-current@freebsd.org, freebsd-net@freebsd.org Subject: Re: ifconfig_bxe0_ipv6="inet6 accept_rtadv" seems to break bridging In-Reply-To: Message-ID: <00682777-qrr3-0r0p-63o3-no2n18166q50@yvfgf.mnoonqbm.arg> References: X-OpenPGP-Key-Id: 0x14003F198FEFA3E77207EE8D2B58B8F83CCF1842 List-Id: Networking and TCP/IP with FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-net List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-net@FreeBSD.org MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed X-Spamd-Result: default: False [-3.98 / 15.00]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; NEURAL_HAM_LONG(-1.00)[-0.998]; NEURAL_HAM_SHORT(-0.99)[-0.986]; DMARC_POLICY_ALLOW(-0.50)[zabbadoz.net,none]; R_DKIM_ALLOW(-0.20)[zabbadoz.net:s=20240622]; R_SPF_ALLOW(-0.20)[+ip6:2003:a:140a:2200:6:594:fffe:19]; MIME_GOOD(-0.10)[text/plain]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MISSING_XM_UA(0.00)[]; MIME_TRACE(0.00)[0:+]; TO_DN_SOME(0.00)[]; FROM_HAS_DN(0.00)[]; ASN(0.00)[asn:3320, ipnet:2003::/19, country:DE]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; RCVD_TLS_LAST(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; RCVD_COUNT_THREE(0.00)[4]; MLMMJ_DEST(0.00)[freebsd-current@freebsd.org,freebsd-net@freebsd.org]; DKIM_TRACE(0.00)[zabbadoz.net:+] X-Rspamd-Queue-Id: 4br43p12mbz3sxx X-Spamd-Bar: --- On Thu, 24 Jul 2025, Lexi Winter wrote: > void: >> I've found ifconfig_bxe0_ipv6="inet6 accept_rtadv" breaks bridging >> on a dual stack interface in unless some manual hoops are jumped through. >> >> net.link.bridge.member_ifaddrs is the default ("0") here. >> [...] >> Adding ifconfig_bxe0_ipv6="inet6 accept_rtadv" and then rebooting causes the >> following: > > you should set accept_rtadvd on the bridge interface, not the member > interface. setting it on the member interface will try to assign the > SLAAC address to the member, which is not allowed. .., which is *no longer* allowed by default but was good for ages. -- Bjoern A. Zeeb r15:7