Standard Community Do Not Advertise One
Prepend		 Two Prepends Three Prepends
  All 16030:100 16030:1000 16030:1001 16030:1002 16030:1003
  All Transits 16030:101 16030:1010 16030:1011 16030:1012 16030:1013
  All Peers 16030:102 16030:1020 16030:1021 16030:1022 16030:1023
  All Customers 16030:103 16030:1030 16030:1031 16030:1032 16030:1033
  Catnix (Barcelona) 16030:104 16030:1040 16030:1041 16030:1042 16030:1043
  SwissIX (Zurich) 16030:105 16030:1050 16030:1051 16030:1052 16030:1053
  NYIIX (New York) 16030:106 16030:1060 16030:1061 16030:1062 16030:1063
  Ams-IX (Amsterdam) 16030:107 16030:1070 16030:1071 16030:1072 16030:1073
  Linx (London) 16030:108 16030:1080 16030:1081 16030:1082 16030:1083

Route maps examples:

This example shows how to deny all your advertisement to All Transits:

route-map altecom-out
    permit 10
    set community 16030:1010

This example shows how to prepend advertisements to Ams-IX two times, and deny advertisements to All Transits:

route-map altecom-out
    permit 10
    set community 16030:1010 16030:1072

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