[ixpmanager] Community Tag to 32bit ASNs

[Shahab Vahabzadeh]

Dear Barry,
Thanks for your help, can you help me? What are the equals of general
communities in bgp large community?

DescriptionCommunity
Prevent announcement of a prefix to a peer 0:peer-as
Announce a route to a certain peer rs-asn:peer-as
Prevent announcement of a prefix to all peers 0:rs-asn
Announce a route to all peers rs-asn:rs-asn

I mean equal to the above table? I want to send this doc to customers.
Thanks

On Sat, Nov 7, 2020 at 11:53 AM Barry O'Donovan <barry.odonovan at inex.ie>
wrote:

> Shahab,
>
> that would be correct and the cause is this piece of configuration [1].
>
> While it would be possible to edit this piece of code to allow a 16bit
> ASN affect a member with a 32 bit ASN this would be unwise for a number
> of reasons Nick has gone into in the past on this mailing list.
>
> One of the main issues is that 32bit ASNs support 16bit ASNs but the
> reverse is not true and trying to hack around this will create
> unreasonable expectations from your members around community filtering
> which are technically not possible for you to support.
>
> The answer for this member is to use large BGP communities which are
> fully supported by IXP Manager + Bird2 [2] and have fairly broad support
> these days by vendors [3].
>
> If your member cannot support these, then you can make an exception via
> a per member filter [4] such as this one at INEX [5].
>
> In the next couple of months we expect to release a UI where members can
> set filters within IXP Manager rather than having to configure communities.
>
>   - Barry
>
>
> [1] https://git.io/JketD
> [2]
>
> https://docs.ixpmanager.org/features/route-servers/#well-known-filtering-communities
> [3] http://largebgpcommunities.net/implementations/
> [4]
>
> https://docs.ixpmanager.org/features/route-servers/#per-asn-import-export-filters
> [5] https://git.io/Jkeqg
>
>
> Shahab Vahabzadeh wrote on 07/11/2020 05:37:
> > Dear All,
> > Customers are claiming that their community tags (like 0:50722) is not
> > sending to customers who has 32bit ASN but all customers with 16bit ASN
> > getting them.
> > Can u help? I am using bird2.
> > Thanks
> >
> > --
> >
> > Cheers, Shahab
> >
> >
> > _______________________________________________
> > INEX IXP Manager mailing list
> > ixpmanager at inex.ie
> > Unsubscribe or change options here:
> https://www.inex.ie/mailman/listinfo/ixpmanager
> >
>
>
> --
>
> Kind regards,
> Barry O'Donovan
> INEX Operations
>
> https://www.inex.ie/support/
> +353 1 531 3339
>
>
>

-- 

Cheers, Shahab
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