Add random number

[Alexander Zubkov]

Maybe not random, but some sorta hash will be useful here? And it
should not break the invariant mentioned by Maria. But for the hash we
still need some means to convert IP addresses to integer numbers,
because including IP into the hash seems to be reasonable.

On Sun, Feb 11, 2024 at 3:12 PM Max Tulyev <maxtul at netassist.ua> wrote:
>
> In our case no. We use the route reflector, so it should export the random route to other routers, not just use it by itself.
>
> On Sun, 11 Feb 2024 08:55:02 -0500
> "Darren O'Connor" <mellow.drifter at gmail.com> wrote:
>
> > Isn't this a problem for multipath/add path to fix?
> >
> > On Sun, Feb 11, 2024, 08:43 Max Tulyev <maxtul at netassist.ua> wrote:
> >
> > > Yes, that's correct. I have same routes come from different routers, and I
> > > want to spread the traffic between them, but if one router fails - keep it
> > > working using anothers.
> > >
> > > Okay, is it possible to get the variable as the result of the shell
> > > script? Like
> > >
> > > localpref = `cat prefpeer`
> > >
> > > On Sun, 11 Feb 2024 18:04:18 +0800
> > > Brandon Zhi <Brandon at huize.asia> wrote:
> > >
> > > > I think the only usage for random number is for loading balance.
> > > >
> > > > *Brandon Zhi*
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> > > >
> > > > Maria Matejka via Bird-users <bird-users at network.cz>于2024年2月11日
> > > 周日06:03写道：
> > > >
> > > > > Hello!
> > > > >
> > > > > No, it's not possible and it makes the filters non-deterministic which
> > > > > would break a critical invariant in BIRD's internal algorithms.
> > > > >
> > > > > If you better clarify what you are trying to achieve, we may find
> > > another
> > > > > way for you to do it, or at least convert it to a viable feature
> > > request.
> > > > >
> > > > > Thank you for your understanding
> > > > > Maria
> > > > > On 2024-02-10 20:56, Max Tulyev wrote:
> > > > >
> > > > > Hi All,
> > > > >
> > > > > is it possible to add a random number to some variable in the filter?
> > > > >
> > > > > For example, like this:
> > > > >
> > > > > filter myfilter
> > > > > {
> > > > >     if net ~ 192.168.11.0/24 then preference = preference +
> > > random(10);
> > > > >
> > > > > ...
> > > > >
> > > > > --
> > > > > Maria Matejka (she/her) | BIRD Team Leader | CZ.NIC, z.s.p.o.
> > > > >
> > > > >
> > >
> > >
>