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. 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-multimedia.eu> wrote: > 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: class=0x028000 rev=0x00 hdr=0x00 vendor=0x15b3 device=0x1007 subvendor=0x103c subdevice=0x22f3 > vendor = 'Mellanox Technologies' > device = 'MT27520 Family [ConnectX-3 Pro]' > class = network > Corrected = Advisory Non-Fatal Error > > > > Hope it helps, > > > Benoît > ------- Original Message ------- > On Wednesday, June 14th, 2023 at 10:29, Alexander Chernikov melifaro@FreeBSD.org wrote: > > > > > > On 14 Jun 2023, at 07:05, Benoit Chesneau benoitc@enki-multimedia.eu wrote: > > > > > > Hi, > > > > > > 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. > > > > Could you add a bit more context? > > What is the FreeBSD version (uname -srm)? > > What does 'route add 1.1.1.0/24 -blackhole’ show? > > Could you also share netstat -4rnW and ifconfig output (maybe privately)? > > > > > 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 what would be the other way to do it? > > > > > > Benoît
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