howto/Bird-communities.md
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@@ -42,7 +42,7 @@ Propagation:
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```
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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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+Two utilites which measure round trip time and calculate community values automatically are provided, written in [ruby](https://github.com/Mic92/bird-dn42/blob/master/bgp-community.rb) and [C](https://github.com/nixnodes/bird/blob/master/misc/dn42-comgen.c).
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```
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$ ruby bgp-community.rb --help