Re: can't add a /24 blackhole route with a /32 loopback
- Reply: Benoit Chesneau : "Re: can't add a /24 blackhole route with a /32 loopback"
- Reply: Alexander Chernikov : "Re: can't add a /24 blackhole route with a /32 loopback"
- In reply to: Benoit Chesneau : "Re: can't add a /24 blackhole route with a /32 loopback"
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Date: Wed, 14 Jun 2023 09:42:13 UTC
> On 14 Jun 2023, at 10:06, Benoit Chesneau <benoitc@enki-multimedia.eu> wrote: > > 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 > ``` Interesting. Could you also share full ifconfig output or at least ifconfig for each of the loopbacks? If the output contains something you’re not comfortable sharing in the ML, you could consider sending it directly to my email. > > > ------- 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