Strange behaviour on filtering bgp_large_community ...

[Marek Küthe]

I also noticed once that my filters only work correctly when I make (x,
y, z) ~ bgp_large_community, the other way around it didn't work for me
either. I didn't think anything about it though. Maybe this is a bug?

On Mon, 15 May 2023 12:59:11 +0200
Tim Weippert via Bird-users <bird-users at network.cz> wrote:

> Hi List, 
> 
> maybe i'm doing something wrong, but if i use some quick and dirty
> filter on the CLI all is working as expecting:
> 
> show route where bgp_large_community ~ [(65000, 0, 1001)]
> show route where (65000, 0, 1001) ~ bgp_large_community
> 
> both get the expected results, show all routes with the specific
> community attached.
> 
> If i use it in a filter function to filter the routes out:
> 
> function filter_large(int TestID)
> {
>   if ( bgp_large_community ~ [(65000, 0, TestID)] ) then { return false; }
>   return true;
> }
> 
> i get "all" routes, if clause doesn't get catched.
> 
> function filter_large_V2(int TestID)
> {
>   if ( (65000, 0, TestID) ~ bgp_large_community ) then { return false; }
>   return true;
> }
> 
> with the V2 function i get what i want, filter out all routes with the
> community attached and show all the rest.
> 
> I'm a little confused here, because the first version of the if clause is
> used for bgp_ext_community on several functions on my setup and working
> as expected, only for bgp_large_community i need to switch to if clause
> from version V2, and only in a function?
> 
> Can someone confirm or explain this?
> 
> regards, 
> tim
> 
> -- 
> Tim Weippert
> http://weiti.org - weiti at weiti.org
> GPG Fingerprint - E704 7303 6FF0 8393 ADB1  398E 67F2 94AE 5995 7DD8


-- 
Marek Küthe
m.k at mk16.de
er/ihm he/him
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 833 bytes
Desc: OpenPGP digital signature
URL: <http://trubka.network.cz/pipermail/bird-users/attachments/20230515/7296bffa/attachment.sig>