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Thu, 24 Jul 2025 08:59:06 -0400 (EDT) Date: Thu, 24 Jul 2025 13:59:04 +0100 From: void To: freebsd-current@freebsd.org Cc: freebsd-net@freebsd.org Subject: ifconfig_bxe0_ipv6="inet6 accept_rtadv" seems to break bridging Message-ID: Mail-Followup-To: freebsd-current@freebsd.org, freebsd-net@freebsd.org List-Id: Discussions about the use of FreeBSD-current List-Archive: https://lists.freebsd.org/archives/freebsd-current List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-current@FreeBSD.org MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline X-Spamd-Result: default: False [-2.24 / 15.00]; NEURAL_HAM_SHORT(-1.00)[-0.996]; MID_RHS_NOT_FQDN(0.50)[]; DMARC_POLICY_ALLOW(-0.50)[f-m.fm,none]; NEURAL_HAM_LONG(-0.44)[-0.442]; R_DKIM_ALLOW(-0.20)[f-m.fm:s=fm2,messagingengine.com:s=fm2]; R_SPF_ALLOW(-0.20)[+ip4:103.168.172.128/27]; NEURAL_HAM_MEDIUM(-0.20)[-0.197]; RCVD_IN_DNSWL_LOW(-0.10)[103.168.172.153:from]; MIME_GOOD(-0.10)[text/plain]; RCPT_COUNT_TWO(0.00)[2]; RCVD_TLS_LAST(0.00)[]; FREEMAIL_FROM(0.00)[f-m.fm]; MIME_TRACE(0.00)[0:+]; RCVD_COUNT_THREE(0.00)[3]; ARC_NA(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; FROM_HAS_DN(0.00)[]; FREEMAIL_ENVFROM(0.00)[f-m.fm]; TO_DN_NONE(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; DKIM_TRACE(0.00)[f-m.fm:+,messagingengine.com:+]; MLMMJ_DEST(0.00)[freebsd-current@freebsd.org,freebsd-net@freebsd.org]; ASN(0.00)[asn:151847, ipnet:103.168.172.0/24, country:AU]; RCVD_VIA_SMTP_AUTH(0.00)[]; MISSING_XM_UA(0.00)[]; DWL_DNSWL_NONE(0.00)[messagingengine.com:dkim] X-Rspamd-Queue-Id: 4bnrg04K5vz3Psc X-Spamd-Bar: -- Hi, context is 15.0-CURRENT #0 n278914-e0838f8a2e61 GENERIC-NODEBUG amd64 1500053 1500053 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. Imagine that 203.0.113.0/24 is real and routable. The following works as expected. if the machine reboots, ipv4 starts normally. cloned_interfaces="bridge0 tap0" ifconfig_bxe0="up" ifconfig_bridge0="203.0.113.2/24 addm bxe0 addm tap0" defaultrouter="203.0.113.1" Adding ifconfig_bxe0_ipv6="inet6 accept_rtadv" and then rebooting causes the following: Initially, only ipv6 works. ipv4 shows the following responses to route commands: # route show 1.1.1.1 route: route has not been found # route add default 203.0.113.1 route: message indicates error: Invalid argument add net default: gateway 203.0.113.1 fib 0: Invalid argument Running service netif restart stops ipv6 routing and ipv4 starts working normally. In order to have functioning dual stack, I have to 'sysctl net.link.bridge.member_ifaddrs=1' and netif restart. Is this known/expected? --