This document has been extracted from Internet2 NOC
Internet2 BGP Communities
Internet2 External Traffic Influencing Communities
International, Non-International, or FEDNET peers may send the below
community and we will set their localpref to 40 or 160 respectively:
* Default - 100
* 11537:40 - Low
* 11537:160 - High
Connectors may send the below community and we will set their localpref
to 140 or 260 respectively:
* Default - 200
* 11537:140 - Low
* 11537:260 - High
Internet2 Peers may send the following communities:
* 11537:2002 - Block prefix to commercial R&E peers.
Internet2 International (ITN) peers may send the below communities for
path prepending:
* 65001:65000 - prepend x1
* 65002:65000 - prepend x2
* 65003:65000 - prepend x3
The following community combination of : allows you to block
or prepend prefixes sent to individual international (ITN) peers. This
is in the process of being deployed, once a peer has had the necessary
configuration added, their ASN will be added here.
* Codes:
* 65000 - prefixes will not be sent to ITN peer’s ASN
* 65001 - prefixes will be prepended 1 time to ITN peer’s ASN
* 65002 - prefixes will be prepended 2 times to ITN peer’s ASN
* 65003 - prefixes will be prepended 3 time2 to ITN peer’s ASN
* 65012 - prefixes will only be sent to ITN peer's ASN
* ITN Peer ASN:
+ 2603 - NORDUnet
+ 20965 - GEANT
Internet2 Internal Traffic Influencing Communities
Internet2-connected Gigapops and connectors with heterogeneous
participants (i.e. not all are universities) may need to use these
communities to help them pass prefixes appropriately to their
participants. For example, connectors can pass all prefixes on to
their university participants, but should not pass commercial or US
Fednet prefixes to their commercial or Fednet participants.
* 11537:888 - Block to external (Internet2 uses this community to
mark prefixes that will not be reannounced to external peers).
* 11537:902 - non-I2 R&E sites sponsored for connection by members.
* 11537:910 - sponsored educational groups (Primary state networks).
* 11537:911 - Black Hole. Traffic to these prefixes will be
discarded.
* 11537:950 - Internet2 Participants.
* 11537:2000 - Commercial research - Lab participant.
* 11537:2001 - Special Commercial prefix used for V6 or multicast.
* 11537:2500 - Block advertisement to international.
* 11537:2501 - International.
* 11537:3000 - FEDNET (US Federal Peer Network).
* 11537:3500 - Connector Only (Internet2 uses this to mark prefixes
sent to connectors but not peers).
* 11537:4000 - RHCPP (Rural Health Network Groups).
* 11537:6001 - LHCOne Connectors.
* 11537:6002 - LHCOne Peers
NET+ BGP Communities
Internet2 has implemented a set of BGP communities that, along with
your own local BGP import policy, will allow you to control your
traffic path to/from the Internet2 NET+ peer networks. All of these
communities are specific to individual peer networks and do not affect
routing to/from the other peer networks.
* 11537:5000 - Internet2 NET+ Services.
* 11537:5001 - Telepresence.
* 11537:5002 - Cloud.
* 11537:5003 - SIP
* 11537:5004 - Amazon
* 11537:5005 - Blue Jeans Network
* 11537:5006 - Rackspace
* 11537:5007 - Code42
* 11537:5008 - Black Board
* 11537:5009 - IDsolutions/Vidyo
* 11537:5010 - Fuze
* 11537:5011 - Desire2Learn
* 11537:5012 - R Systems
* 11537:5013 - ServiceNow
* 11537:5014 - Microsoft
* 11537:5500 - Block to NET+ (Internet2 uses this to mark prefixes
that will not be sent to NET+ peers).
The following community combination of : allows you to block
or prepend prefixes sent to individual NET+ peers.
* Codes:
+ 65000 - prefixes will not be sent to NET+ peer’s ASN
+ 65001 - prefixes will be prepended 1 time to NET+ peer’s
ASN
+ 65002 - prefixes will be prepended 2 times to NET+ peer’s
ASN
+ 65003 - prefixes will be prepended 3 time2 to NET+ peer’s
ASN
* NET+ peer ASN’s
+ 33011 - Box.net
+ 16509 - Amazon
+ 21834 - Desire2Learn
+ 18541 - Blue Jeans Network
+ 19994 - Rackspace
+ 62715 - Code42
+ 22556 - Blackboard
+ 64999 - IDsolutions/Vidyo
+ 14294 - Fuze
+ 19793 - R Systems
+ 16839 - ServiceNow
+ 8075 - Microsoft
NET+ Routes coming into the Internet2 IP Network are tagged with one of
the following city specific communities:
* 11537:249 Mclean, VA (Washington, DC)
* 11537:242 New York
* 11537:243 Atlanta
* 11537:241 Chicago - Level(3)
* 11537:245 Kansas City
* 11537:244 Houston
* 11537:246 Salt Lake City
* 11537:247 Seattle
* 11537:250 Cleveland
* 11537:248 Los Angeles
* 11537:253 Ashburn
* 11537:254 Chicago - Equinix
Internet2 Prefix Advertisement Matrix
Non-International Peers International Peers Connectors Commercial
Participants Internet2 NET+
Federal Peer Network NO NO YES YES YES
Sponsored Participant YES YES YES YES YES
Sponsored Education Group Participant YES YES YES YES YES
Network Participant YES YES YES YES YES
Commercial Participant YES YES YES NO NO
Connector Only NO NO YES NO YES
Internet2 Net+ NO NO YES NO NO
YES indicates prefixes from the network class in that row are sent to
the network class in that column.
Internet2 CPS BGP Communities
Internet2 has implemented a set of BGP communities that, along with
your own local BGP import policy, will allow you to control your
traffic path to/from the Internet2 CPS peer networks. All of these
communities are specific to individual peer networks and do not affect
routing to/from the other peer networks.
* 65000:* - Apply this community to your prefix if you do not want
CPS peer network X to send traffic to you over Internet2 CPS. Where
"*" denotes the ASN of the peer network X. If your BGP import
policy is also set to reject Internet2's advertisements of routes
from ASN "*", you will not send traffic to network X over Internet2
CPS either.
* 65001:* - "*" is the ASN of network X. Will pad AS-PATH towards
network X 1 time.
* 65002:* - "*" is the ASN of network X. Will pad AS-PATH towards
network X 2 time.
* 65003:* - "*" is the ASN of network X. Will pad AS-PATH towards
network X 3 time.
BGP Community Controls for TR-CPS
BGP Community Controls for TR/CPS Participants:
(reviewed by NTAC Peering and Routing WG, June 15th, 2010)
During the April 20th NTAC Peering and Routing WG call, an inquiry was
made regarding support within the consolidated TR/CPS network for BGP
communities to allow traffic control by participants. The legacy
Internet2 CPS network (AS11537) supports a set of BGP communities which
allow connectors to control their traffic to/from CPS peer networks;
the legacy TransitRail network (AS11164) supports a similar set of BGP
communities to provide the same functionality. To ease the transition
of connections to the consolidated TR/CPS network the communities of
both the legacy TransitRail and CPS networks are supported on links to
AS11164 as described below.
The group of communities for selective prepending and no-export are:
* 65000: Do not advertise at all to the peer ASN
* 65001: Prepend once toward peer ASN
* 65002: Prepend twice toward peer ASN
* 65003: Prepend thrice toward peer ASN
* 65009: Allow advertisement toward peer ASN if otherwise
excluded by more general community control
* 65500x: Variants of the above communities (to be deprecated *)
The following communities can be used to blackhole traffic to more
specific netblocks (up to /32):
* 11164:53666 Rewrite next hop to discard traffic
* 11537:911 (to be deprecated *)
The following communities can be used to alter relative preference
within the consolidated TR/CPS network (AS11164):
* 11164:51240 Set preference of learned route Above standard local
preference value for Participant.
* 11537:260 (to be deprecated *)
* 11164:51200 Set preference of learned route Below standard local
preference value for Participant.
* 11537:140 (to be deprecated *)
These additional communities are available to alter relative
preference. Though available, these communities are rarely used and can
take substantial care to appreciate the outcome from using them:
* 11164:51080 Set preference of learned route Below standard local
preference value for Settlement Free Peers.
* 11164:51050 Set preference of learned route Below standard local
preference value for any Transit Providers (no Transit Providers
exist to-date).
Additionally, these communities can be used to alter the announcement
profile of your routes:
* 11164:52400 Do not export to North American peers (all TR/CPS peers
to-date)
* 11164:52401 Prepend once to North American peers
* 11164:52402 Prepend twice to North American peers
* 11164:52403 Prepend thrice to North American peers
* 11164:52300 Do not export to Extended Peers
Related communities for future use, but which are in-active in the
network, at present:
* 11164:52200 Do not export to transit
* 11164:52201 Prepend once to transit
* 11164:52202 Prepend twice to transit
* 11164:52203 Prepend thrice to transit
* 11164:52500 Do not export via peer-links in Asia-Pac
* 11164:52501 Prepend once via peer-links in Asia-Pac
* 11164:52502 Prepend twice via peer-links in Asia-Pac
* 11164:52503 Prepend thrice via peer-links in Asia-Pac
* 11164:52600 Do not export via peer-links in Europe
* 11164:52601 Prepend once via peer-links in Europe
* 11164:52602 Prepend twice via peer-links in Europe
* 11164:52603 Prepend thrice via peer-links in Europe
* The indicated BGP communities will be supported through the period of
integration of the legacy TR and CPS networks: their use will be
deprecated within the consolidated TR/CPS network after the integration
is complete. These changes will not affect the set of communities
available to connectors within the Internet2 (R&E)
network:
Please let us know if you have questions,