[nog] BGP communities

Marian Marinov mm at 1h.com
Sat Oct 22 19:53:42 EEST 2016

On 10/21/2016 06:14 PM, Vasil Kolev wrote:
> On Fri, 21 Oct 2016 17:59:21 +0300
> Marian Marinov <mm at 1h.com> wrote:
>> Hello guys,
>> I'm considering nogetiating BGP communities with my upstreams.
>> Each of my uptreams has two or more upstreams. Ideally what I want to
>> do is have a community for each of the uptreams of my isps.
>> What would be the best configuration scheme. And I don't mean router
>> configuration but choosing communities and mapping them to each ISP.
>> I'm currently running bird for BGP and I have 12 BGP sessions of
>> which 8 are for international traffic.
>> Each of my ISPs gives me two separate links, so two BGP sessions.
>> Should I agree on the same communities between me and the ISP via
>> both links(which I believe to be the correct assumption) or should I
>> configure different communites for each link?
>> What do you consider BCP?
> If none of them has community support, you can try to ask them for
> both, the question is mostly what do you want. Some good examples are
> Level3 https://onestep.net/communities/as3356/ and Tinet
> https://onestep.net/communities/as3257/ , but in the end the question
> is what do you want to be able to do with inbound and outbound
> communities and the upstreams can support that.
> (for example, He.net only have a blackhole community, which they enable
> only if you ask, and refuse to do anything else, probably because they
> don't want to give anyone that much control over their routing).

Basicaly I want to be abel to choose which upstream (from the ones that my ISPs have) to use. This would allow me to reroute destinations around certain routing issues in the world.

Marian Marinov
Founder & CEO of 1H Ltd.
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