howto/Bird-communities.md
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For example, if your peer is 12ms away and the link speed between you is 250Mbit/s and you are peering using OpenVPN P2P, then the community string would be (3, 24, 33).
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+You might want to use this [script](https://github.com/Mic92/bird-dn42/blob/master/bgp-community.rb) to measure round trip time and calculate community values automatically.
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See also this [mail](https://lists.nox.tf/pipermail/dn42/2015-December/001259.html) for communities for route origin.
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## Example configurations