Date: Wed, 14 Jun 2023 09:06:11 +0000 From: Benoit Chesneau <benoitc@enki-multimedia.eu> To: Benoit Chesneau <benoitc@enki-multimedia.eu> Cc: Alexander Chernikov <melifaro@FreeBSD.org>, "freebsd-net@FreeBSD.org" <freebsd-net@freebsd.org> Subject: Re: can't add a /24 blackhole route with a /32 loopback Message-ID: <sgx1BljfJfV-Bn0PlfJ0va7yWHE9QraHpTjPBB6jlJWq4aehFwihem8C8f3ikkjvdEGIYY15S3ppTkQpWDfR3LDi_IKewBg7XQ1v9_u3SC4=@enki-multimedia.eu> In-Reply-To: <t_gT66nRcCT4fte7HbEMcM6J2spH-rEGFNYtZqX0GsUlxW4R5_pEVx3ZqtAwphKT4UBZsGZKX9gxeym1SKdc5GmceXGy1rRYEnSU1X6-_8c=@enki-multimedia.eu> References: <9Jh8lSg93tjEc0-UEU3MQkGuQc7R9Aht0NBt4kEr6-wtgMdf673nws_jGaHelYwz0U78ik2BM4WLUca2JZAjrX-WSbP5QS4rsvoBHZo_JZo=@enki-multimedia.eu> <4DF565CC-D8AE-4F35-A7CF-7ED5AAD27B49@FreeBSD.org> <t_gT66nRcCT4fte7HbEMcM6J2spH-rEGFNYtZqX0GsUlxW4R5_pEVx3ZqtAwphKT4UBZsGZKX9gxeym1SKdc5GmceXGy1rRYEnSU1X6-_8c=@enki-multimedia.eu>
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I forgot oto add the error message , sorry.=20 When I try to set the theblackhole flag I get the following error: ``` route: writing to routing socket: Operation not supported change net 1.1.1.0 fib 0: Operation not supported ``` ------- Original Message ------- On Wednesday, June 14th, 2023 at 10:38, Benoit Chesneau <benoitc@enki-multi= media.eu> wrote: > Hi, >=20 > Thanks for your answer. I'm using Freebsd 13.2 latest version: >=20 > $ uname -srm > FreeBSD 13.2-RELEASE amd64 >=20 > I edited the filtred result of the table since it has a full view: >=20 > 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 >=20 >=20 > Also I forgot to mention that the ethernet driver is MLX4EN(4): >=20 > mlx4_core0@pci0:8:0:0: class=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 >=20 >=20 >=20 > Hope it helps, >=20 >=20 > Beno=C3=AEt > ------- Original Message ------- > On Wednesday, June 14th, 2023 at 10:29, Alexander Chernikov melifaro@Free= BSD.org wrote: >=20 >=20 >=20 > > > On 14 Jun 2023, at 07:05, Benoit Chesneau benoitc@enki-multimedia.eu = wrote: > > >=20 > > > Hi, > > >=20 > > > When I setup a loopback to a /32 , I can add a /24 as a blackhole rou= te 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 the= re 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 othe= r nodes using OSPF. I can probably make the loopback a /24 used by bird but= what would be the other way to do it? > > >=20 > > > Beno=C3=AEt
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