Communities that can be sent by customer (after engineering approval):

       3257:1030       do not announce to Sprint
       3257:1031       prepend 1x to Sprint
       3257:1032       prepend 2x to Sprint
       3257:1033       prepend 3x to Sprint

       3257:1010       do not announce to Cogent
       3257:1500       do not announce to HE (IPv6)
       3257:1510       do not announce to IIJ (IPv6)
       3257:1522       prepend 2x to UPC/Chello/Aorta (6830)
       3257:2498       keep in Italy

       3257:2490       do not announce in Europe
       3257:2491       prepend 1x in Europe
       3257:2492       prepend 2x in Europe
       3257:2493       prepend 3x in Europe

       3257:2990       do not announce in the US
       3257:2991       prepend 1x in the US
       3257:2992       prepend 2x in the US
       3257:2993       prepend 3x in the US

      3257:1980 - give routes localpref below normal customer route
      3257:1970 - give routes localpref below normal peer route
      3257:1960 - give routes localpref below transit route

Communities that are sent on customer BGP sessions:

      3257:1xxx and 3257:2xxx control route behaviour in our network,
      3257:3xxx tags private peerings and upstreams
      3257:4000 tags TINet customer route
      3257:4010-4499 tags EU exchanges (detailed list available on request)
      3257:4500-4999 tags US exchanges (detailed list available on request)

      the 3257:5xxx communities are used to tag the geographic
      region of route entrance into our network:

      3257:5010       route originated in the US
      3257:5030       route originated in GR
      3257:5031       route originated in NL
      3257:5032       route originated in BE
      3257:5033       route originated in FR
      3257:5034       route originated in ES
      3257:5352       route originated in LU
      3257:5353       route originated in IE
      3257:5039       route originated in IT
      3257:5041       route originated in CH
      3257:5042       route originated in CZ
      3257:5043       route originated in AT
      3257:5044       route originated in UK
      3257:5045       route originated in DK
      3257:5046       route originated in SE
      3257:5047       route originated in NO
      3257:5049       route originated in DE
      3257:5099       multi-national prefix