From nobody Wed Jun 14 08:38:28 2023 X-Original-To: freebsd-net@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4QgzNS5Y8Gz4cyy0 for ; Wed, 14 Jun 2023 08:38:48 +0000 (UTC) (envelope-from benoitc@enki-multimedia.eu) Received: from mail-4018.proton.ch (mail-4018.proton.ch [185.70.40.18]) (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 "protonmail.com", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4QgzNS1RRxz3PcG for ; Wed, 14 Jun 2023 08:38:48 +0000 (UTC) (envelope-from benoitc@enki-multimedia.eu) Authentication-Results: mx1.freebsd.org; none Date: Wed, 14 Jun 2023 08:38:28 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=enki-multimedia.eu; s=protonmail3; t=1686731924; x=1686991124; bh=yzrtJG1vcwdyDI66FGJ5lvNFVs6n6YauzkHXwFrygLQ=; h=Date:To:From:Cc:Subject:Message-ID:In-Reply-To:References: Feedback-ID:From:To:Cc:Date:Subject:Reply-To:Feedback-ID: Message-ID:BIMI-Selector; b=nqaxtLI+ClcbmcbfkbDf/KNoW6KIYVu8AnZgHH2n0GrPlwXTd07aTPXDYmbOHKBZx Mzi9r9OXeh3RNymt4REkt88Y916TfxarlADFumz3SPRBnaUiBqyy1M57XW2ySCKv5T Z9ymXn44waZqRRKN7pxn+FNuiCwaCrogj9P1H2mDkbadEYHWSC6jqco/iM5nvoTuVV tLFEBwPD+Ht7/PmcJWs4lXuB7VF4hNPoPfkceDWorr/aQi8AalDfqSgKoUhmCu5KGG MQaD4Yu/EQYQCqWn9uJf/0dW3p2hORzNQlAykgKYBevj3SzH5ebtiWBTKdyTDO33QG KRYHA8pmPfVRQ== To: Alexander Chernikov From: Benoit Chesneau Cc: "freebsd-net@FreeBSD.org" Subject: Re: can't add a /24 blackhole route with a /32 loopback Message-ID: In-Reply-To: <4DF565CC-D8AE-4F35-A7CF-7ED5AAD27B49@FreeBSD.org> References: <9Jh8lSg93tjEc0-UEU3MQkGuQc7R9Aht0NBt4kEr6-wtgMdf673nws_jGaHelYwz0U78ik2BM4WLUca2JZAjrX-WSbP5QS4rsvoBHZo_JZo=@enki-multimedia.eu> <4DF565CC-D8AE-4F35-A7CF-7ED5AAD27B49@FreeBSD.org> Feedback-ID: 9066678:user:proton 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=utf-8 Content-Transfer-Encoding: quoted-printable X-Rspamd-Queue-Id: 4QgzNS1RRxz3PcG X-Spamd-Bar: ---- X-Spamd-Result: default: False [-4.00 / 15.00]; REPLY(-4.00)[]; ASN(0.00)[asn:62371, ipnet:185.70.40.0/24, country:CH] X-Rspamd-Pre-Result: action=no action; module=replies; Message is reply to one we originated X-ThisMailContainsUnwantedMimeParts: N Hi, Thanks for your answer. I'm using Freebsd 13.2 latest version: $ uname -srm FreeBSD 13.2-RELEASE amd64 I edited the filtred result of the table since it has a full view: netstat -4rnW |grep -e "1.1.1" 1.1.1.0/24 127.0.0.1 USB 14 16384 lo0 1.1.1.1 link#9 UHS 26 16384 lo1 1.1.1.2 10.3.1.1 UGH1 15 9000 vlan2212 1.1.1.2 10.3.1.1 UGHS 16 1500 vlan2212 1.1.1.2 10.3.1.1 UGHS 25 9000 vlan2212 Also I forgot to mention that the ethernet driver is MLX4EN(4): mlx4_core0@pci0:8:0:0:=09class=3D0x028000 rev=3D0x00 hdr=3D0x00 vendor=3D0x= 15b3 device=3D0x1007 subvendor=3D0x103c subdevice=3D0x22f3 vendor =3D 'Mellanox Technologies' device =3D 'MT27520 Family [ConnectX-3 Pro]' class =3D network Corrected =3D Advisory Non-Fatal Error Hope it helps, Beno=C3=AEt=20 ------- Original Message ------- On Wednesday, June 14th, 2023 at 10:29, Alexander Chernikov wrote: > > On 14 Jun 2023, at 07:05, Benoit Chesneau benoitc@enki-multimedia.eu wr= ote: > >=20 > > Hi, > >=20 > > When I setup a loopback to a /32 , I can add a /24 as a blackhole route= anymore. I can only create a /24 attached to this looopback. Ie. >=20 > Could you add a bit more context? > What is the FreeBSD version (uname -srm)? > What does 'route add 1.1.1.0/24 -blackhole=E2=80=99 show? > Could you also share netstat -4rnW and ifconfig output (maybe privately)? >=20 > > when `lo1` is set to `1.1.1.1/32` I cant create a blackhole route to `1= .1.1.0/24` using the command : `route add 1.1.1.0/24 -blackhole` . Is there= any reason for it? The idea is to be able to advertise the prefix `1.1.1.0= /24` via BGP (bird) and use 1.1.1.1/32` as a loopback distributed to other = nodes using OSPF. I can probably make the loopback a /24 used by bird but w= hat would be the other way to do it? > >=20 > > Beno=C3=AEt