Add random number

[Maria Matejka]

Multipath is the way to go, yes.

Introducing external values and variables may become gradually possible with BIRD 3 in future. Not promising anything, but if any of you has any feature request regarding this, feel free to state it, ideally including some explicit use cases for that.

We're currently thinking e.g. about adding custom variables to protocols (accessible then from the filters, ofc).

Maria

On 11 February 2024 14:55:02 CET, 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*
>> > HUIZE LTD
>> > www.huize.asia  <https://huize.asia/>| www.ixp.su | Twitter
>> >
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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.
>> > >
>> > >
>>
>>

-- 
Maria Matejka (she/her) | BIRD Team Leader | CZ.NIC, z.s.p.o.
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