BGP Communities

Colt implements community marking on it's network to control the announcement of routes and hence flow of traffic into and out of the network. Customers can set some of these communities on prefixes announced to Colt.

Manipulation Communities

The following communities can be used by customers to alter their route advertisements within the Colt network and to Colt peers.

Local Preference

The following communities allow a customer to set a local preference on a prefix advertised to Colt. The default local preference set on all received customer routes is 111.

Set local preference to 120
8220:63700
Set local preference to 40
8220:63900
Advertisements to Colt Peers

Using the following format 8220:63aee a customer can control how their routes are advertised to peers.

Possible values for a:
Do not advertise
0
Prepend x1
1
Prepend x2
2
Prepend x3
3
Possible values for ee:
Amsterdam
Netherlands
Europe
08
Barcelona
Spain
Europe
07
Berlin
Germany
Europe
04
Brussels
Belgium
Europe
09
Bucharest
Romania
Europe
42
Copenhagen
Denmark
Europe
17
Frankfurt
Germany
Europe
02
Geneva
Switzerland
Europe
11
Hong Kong
Hong Kong
Asia Pacific
27
Lisbon
Portugal
Europe
21
London
United Kingdom
Europe
01
Madrid
Spain
Europe
06
Milan
Italy
Europe
05
Osaka
Japan
Asia Pacific
26
Paris
France
Europe
03
Rome
Italy
Europe
23
San Jose
United States
North America
40
Singapore
Singapore
Asia Pacific
28
Stockholm
Sweeden
Europe
14
Sydney
Australia
Oceania
44
Tokyo
Japan
Asia Pacific
25
Turin
Italy
Europe
24
Vienna
Austria
Europe
12
Warsaw
Poland
Europe
43
Washington
United States
North America
39
Zurich
Switzerland
Europe
10
All Upstreams
Global
Global
92
All Peers (Not Upstreams)
Global
Global
99

For example setting 8220:63008 on an advertised route will not announce that route to all peers in Amsterdam and setting 8220:63210 will prepend 8220 8220 on the route to all peers in Zurich.

Special Communities

The following communities allow a customer to blackhole or not advertise a prefix.

No advertise Peers
8220:63099
Do not advertise the prefix to any peer
Blackhole
8220:63999
Blackhole all traffic. Can be exact customer prefix as documented in an IRR or a /32 host route. This may blackhole on our interconnect partners networks in addition to the Colt network.
No Export
8220:63800
Do not advertise this prefix over any eBGP peering session

Informational Communities

Colt routes/prefixes are tagged with a country and region of origin.

Region of Origin Communities
Europe
8220:65000
North America
8220:65001
Asia Pacific
8220:65002
Africa
8220:65003
South America
8220:65004
Oceania
8220:65005
City of Origin Communities
Amsterdam
Netherlands
Europe
8220:65040
Atlanta
United States
North America
8220:65256
Barcelona
Spain
Europe
8220:65070
Basel
Switzerland
Europe
8220:65111
Berlin
Germany
Europe
8220:65035
Birmingham
United Kingdom
Europe
8220:65011
Bordeaux
France
Europe
8220:65025
Bratislava
Solvakia
Europe
8220:65102
Brussels
Belgium
Europe
8220:65080
Bucharest
Romania
Europe
8220:65104
Budapest
Hungary
Europe
8220:65103
Chicago
United States
North America
8220:65250
Cologne
Germany
Europe
8220:65031
Copenhagen
Denmark
Europe
8220:65160
Dallas
United States
North America
8220:65255
Dublin
Ireland
Europe
8220:65140
Duesseldorf
Germany
Europe
8220:65032
Frankfurt
Germany
Europe
8220:65030
Geneva
Switzerland
Europe
8220:65120
Hamburg
Germany
Europe
8220:65033
Hannover
Germany
Europe
8220:65034
Helsinki
Finland
Europe
8220:65131
Hong Kong
Hong Kong
Asia Pacific
8220:65300
Lisbon
Portugal
Europe
8220:65180
London
United Kingdom
Europe
8220:65010
Los Angeles
United States
North America
8220:65253
Lyon
France
Europe
8220:65022
Madrid
Spain
Europe
8220:65050
Marseille
France
Europe
8220:65024
Milan
Italy
Europe
8220:65060
Munich
Germany
Europe
8220:65037
Nantes
France
Europe
8220:65152
New York
United States
North America
8220:65201
Newark
United States
North America
8220:65201
Osaka
Japan
Asia Pacific
8220:65301
Paris
France
Europe
8220:65020
Phoenix
United States
North America
8220:65254
Prague
Czech Republic
Europe
8220:65101
Rome
Italy
Europe
8220:65062
Rouen
France
Europe
8220:65151
San Jose
United States
North America
8220:65252
Seattle
United States
North America
8220:65251
Singapore
Singapore
Asia Pacific
8220:65302
Sofia
Bulgaria
Europe
8220:65105
Stockholm
Sweeden
Europe
8220:65130
Stuttgart
Germany
Europe
8220:65036
Sydney
Australia
Oceania
8220:65304
Tokyo
Japan
Asia Pacific
8220:65303
Toulouse
France
Europe
8220:65023
Turin
Italy
Europe
8220:65061
Valencia
Spain
Europe
8220:65051
Vienna
Austria
Europe
8220:65090
Warsaw
Poland
Europe
8220:65100
Washington
United States
North America
8220:65257
Zurich
Switzerland
Europe
8220:65110