DE-CIX GlobePEER Route Server Informational BGP Communities

Peeringservices_Team Updated by Peeringservices_Team

We use BGP Communities to tag some additional information on redistributed routes.

These kind of BGP Communities will be referred to as Informational BGP Communities

See DE-CIX and DaaS GlobePEER Service Info for an overview of route server ASN in use at all IXPs operated by DE-CIX indicated by placeholder <RS_ASN> below

Route Origin

The route serversย will tag all routes to indicate their origin. You can use this information to determine where a certain route has been injected into the {{IXP_SHORT}} switching platform. This gives you the option to filter routes learned from the route servers based on geographical location.

Everyย routeย you receive from the route servers will haveย fourย (additional) BGP Communitiesย attached which indicate location information:

  • Switch: e.g. {{SWITCH_CODE}} for {{SWITCH}} (see table below for more information)
  • Metro: e.g. {{METRO_CODE}} for {{CITY}} (see table below for more information)
  • Country: e.g. {{COUNTRY_CODE}} for {{COUNTRY}} (UN M49 format)
  • Continent: e.g. {{CONTINENT_CODE}} for {{CONTINENT}} (UN M49 format)
To avoid ambiguity about the semantics of a certain BGP Community, especially when being present multiple times, we strip all BGP Communities from the range that we use for route origin tagging on import. This is:
<RS_ASN>:1911:*
<RS_ASN>:1912:*
<RS_ASN>:1913:*
<RS_ASN>:1914:*
where <RS_ASN> is the corresponding route server ASN at a given IXP.

Route Origin Overview

If the exact location of a customer cannot be determined from the {{IXP_SHORT}} database, or in certain special cases, we mark these routes with <RS_ASN>:191{1-4}:65535, meaning "unknown".
Example

A route has the following BGP Communities attached:

  • 400330:1914:{{EXAMPLE_CONTINENT_CODE}}
  • 400330:1913:{{EXAMPLE_COUNTRY_CODE}}
  • 400330:1912:{{EXAMPLE_METRO_CODE}}
  • 400330:1911:{{EXAMPLE_SWITCH_CODE}}

From these BGP Communities you can deduce that this route has been injected at {{EXAMPLE_IXP}} (ASNย 400330) in Americas (400330:1914:{{EXAMPLE_CONTINENT_CODE}}), {{EXAMPLE_COUNTRY}} (400330:1913:{{EXAMPLE_COUNTRY_CODE}}) in metro region {{EXAMPLE_CITY}} (400330:1912:{{EXAMPLE_METRO_CODE}}) at {{EXAMPLE_SWITCH}} (400330:1911:{{EXAMPLE_SWITCH_CODE}}).

How did we do?

Ruhr-CIX GlobePEER Route Server Informational BGP Communities

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