howto/Bird-communities.md
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@@ -39,8 +39,9 @@ For example, if your peer is 12ms away and the link speed between you is 250Mbit
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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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```
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-$ ruby bgp-community.rb
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-USAGE: bgp-community.rb [-6] host mbit_speed unencrypted|unsafe|encrypted|pfs
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+root@dn42 /etc/bird # ruby bgp-community.rb --help
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+USAGE: bgp-community.rb host mbit_speed unencrypted|unsafe|encrypted|pfs
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+ -6, --ipv6 Assume ipv6 for ping
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$ ruby bgp-community.rb 212.129.13.123 300 encrypted
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# 15 ms, 300 mbit/s, encrypted tunnel (updated: 2016-02-11)
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import where dn42_import_filter(3,24,33);