Community for small IX - problem with 4B ASN

[Alexander Zubkov]

Hello,

Community is a 32bit number, represented as a pair of 2 16bit numbers. That
is why you can not use big AS numbers in its components. But if your and
your peer's equipment supports large communities - you can use them. They
have 3 32bit components.

On Mon, Jan 22, 2018 at 11:15 AM, Piotr Marciniak <zboj at mnc.pl> wrote:

> Hello,
>
> I've spent a while on below docs and faced a problem with 4B ASN we use.
> Bird reports an error 'when 'myas' is 4B => so above 65535.
> See some testing example below:
>
> bird> configure
> Reading configuration from /etc/bird/bird.conf
> /etc/bird/bird.conf, line 81: Value 165250 out of range (0-65535)
>
> The only way this config reports no error is to set here private ASn - fe.
> 65250. But it will never match our real ASn.
>
> Two questions:
>
> 1. Is it possible to enable 4B ASn for communities in Bird? Will it work
> with other rouers?
> 2. Can we use instead private ASn just for community filters? Are they
> processed corretly by other Internet routers of our peers?
>
> Or maybe there is another work around?
>
> Best wishes,
>
> Peter
>
>
> -----Oryginalna wiadomość----- From: Piotr Marciniak
> Sent: Friday, December 29, 2017 5:01 PM
> To: Ondrej Zajicek
> Cc: bird-users at network.cz
> Subject: Re: Community for small IX
>
>
> There are some examples in BIRD wiki, mainly:
>
> https://gitlab.labs.nic.cz/labs/bird/wikis/Route_server_with
> _community_based_filtering_and_multiple_RIBs
> https://gitlab.labs.nic.cz/labs/bird/wikis/Route_server_with
> _community_based_filtering_and_single_RIB
>
> --
> Elen sila lumenn' omentielvo
>
> Ondrej 'Santiago' Zajicek (email: santiago at crfreenet.org)
> OpenPGP encrypted e-mails preferred (KeyID 0x11DEADC3, wwwkeys.pgp.net)
> "To err is human -- to blame it on a computer is even more so."
>
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