From owner-freebsd-net@freebsd.org Tue Apr 27 08:37:29 2021 Return-Path: Delivered-To: freebsd-net@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 52951625C8C for ; Tue, 27 Apr 2021 08:37:29 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.nyi.freebsd.org (mailman.nyi.freebsd.org [IPv6:2610:1c1:1:606c::50:13]) by mx1.freebsd.org (Postfix) with ESMTP id 4FTwB11hBdz3R2K for ; Tue, 27 Apr 2021 08:37:29 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.nyi.freebsd.org (Postfix) id 39C7C62587C; Tue, 27 Apr 2021 08:37:29 +0000 (UTC) Delivered-To: net@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 398BF625A6D for ; Tue, 27 Apr 2021 08:37:29 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4FTwB1138Bz3R0D for ; Tue, 27 Apr 2021 08:37:29 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 1708817951 for ; Tue, 27 Apr 2021 08:37:29 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id 13R8bTM8079386 for ; Tue, 27 Apr 2021 08:37:29 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 13R8bT9l079385 for net@FreeBSD.org; Tue, 27 Apr 2021 08:37:29 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: net@FreeBSD.org Subject: [Bug 248005] nd6 initializes nd_ifinfo->maxmtu = 0 on newly inserted network interfaces Date: Tue, 27 Apr 2021 08:37:29 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: CURRENT X-Bugzilla-Keywords: easy X-Bugzilla-Severity: Affects Many People X-Bugzilla-Who: ae@FreeBSD.org X-Bugzilla-Status: Closed X-Bugzilla-Resolution: FIXED X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: kevans@freebsd.org X-Bugzilla-Flags: maintainer-feedback+ maintainer-feedback? mfc-stable12+ mfc-stable11- X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 27 Apr 2021 08:37:29 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D248005 --- Comment #6 from Andrey V. Elsukov --- How it worked before patch: # ifconfig vlan1000 create vlandev mce3 vlan 1000 up # ifconfig vlan1000 vlan1000: flags=3D8843 metric 0 mtu= 9000 =20=20=20=20=20=20=20 options=3D1c680003 ether 24:8a:07:b4:32:43 inet6 fe80::268a:7ff:feb4:3243%vlan1000 prefixlen 64 scopeid 0x8 groups: vlan vlan: 1000 vlanpcp: 0 parent interface: mce3 media: Ethernet autoselect (100GBase-= CR4 ) status: active nd6 options=3D21 # netstat -Wrnf inet6 | grep vlan1000 fe80::%vlan1000/64 link#8 U = 11=20=20 9000 vlan1000 fe80::268a:7ff:feb4:3243%vlan1000 link#3 UHS = 1=20 16384 lo0 # ndp -i vlan1000 linkmtu=3D0, maxmtu=3D0, curhlim=3D64, basereachable=3D30s0ms, reachable=3D= 27s, retrans=3D1s0ms Flags: nud auto_linklocal=20 After this patch: # netstat -Wrnf inet6 | grep vlan1000 fe80::%vlan1000/64 link#8 U = 11=20=20 1500 vlan1000 fe80::268a:7ff:feb4:3243%vlan1000 link#3 UHS = 1=20 16384 lo0 # ndp -i vlan1000 linkmtu=3D0, maxmtu=3D1500, curhlim=3D64, basereachable=3D30s0ms, reachable= =3D18s, retrans=3D1s0ms Flags: nud auto_linklocal --=20 You are receiving this mail because: You are on the CC list for the bug.=