NLR PacketNet BGP Communities
NLR PacketNet BGP Communities
Communities with numbers less than 1000 are settable by NLR members and peers and advertised into NLR; communities 1000 and above are set by NLR.
Community ranges NLR sets on inbound routes:
peers and members connected to NLR can match on these. Typically the first number in each range is used by default, but other values are reserved for future use.
- NLR internal: 19401:1000-1999
- default community 1000
- NLR members: 19401:2000-3999
- default community 2000, set for members' 10G connections
- community 2001 is set for members' 1G backup connections
- default local-pref is 500 for members' 10G connections, 450 for 1G backup
- R&E peer networks: 19401:4000-4999
- default community 4000
- default local-pref 300
- International peer networks: 19401:5000-6999
- default community 5000
- default local-pref 300
- US Government and Federal Labs: 19401:7000-7999
- default community 7000
- default local-pref 300
- Commercial Labs/Partners: 19401:8000-8999
- default community 8000
- default local-pref 300
- Commodity Peers: 19401:9000-9999
- default community 9000
- default local-pref 100
- Special Events (e.g. SC, iGrid, meetings): 19401:10000-10999
- default community 10000
- default local-pref 1000
Communities NLR members may set to change default NLR behavior for their prefixes:
- Blackhole: 19401:911 – NLR will discard traffic toward this prefix. Only members who “own” this prefix may set the 911 community for it.
- Local-preference modification:
- 19401:600 – set NLR local-pref to 600
- 19401:500 – set NLR local-pref to 500 (may be useful for 1G backup)
- 19401:400 – set NLR local-pref to 400
- 19401:200 – set NLR local-pref to 200
- Export modification: default behavior is to send all learned NLR prefixes to all BGP peers. The following communities are available per-prefix to allow members and peers to modify the default behavior.
- 19401:920 – do not send this prefix to NLR members.
- 19401:921-923 – NLR should prepend one-three ASs to NLR members.
- 19401:924 – NLR should send me only NLR-member prefixes (has the same effect as 940, 950, 970, 980, and 990 together) and NLR will send my prefixes only to NLR members (not to peer Federal or International networks). This community does not affect EVENTs.
- 19401:940 – do not send this prefix to R&E peer networks.
- 19401:941-943 – NLR should prepend one-three ASs to R&E peer networks.
- 19401:950 – do not send prefix to international peer networks.
- 19401:951-953 – NLR should prepend one-three ASs to international peer networks.
- 19401:960 – do not send prefix to special events.
- 19401:961-963 – NLR should prepend one-three ASs to special-event peers.
- 19401:970 – do not send prefix to US Government networks or labs.
- 19401:971-973 – NLR should prepend one-three ASs to US FEDnets.
- 19401:980 – do not send prefix to commercial labs/partners.
- 19401:981-983 – NLR should prepend one-three ASs to commercial connections.
- 19401:990 – do not send prefix to commodity peers.
- 19401:991-993 – NLR should prepend one-three ASs to commodity peers.
