Engineering


BGP Communities

Net Access uses BGP communities to control the announcement (or lack thereof) of routes to peers, and uses communities to identify incoming routes.
We hope this page will help you to better understand and implement them on your network. 

Please contact Net Access Engineering at neteng@nac.net

Communities:               
Transit
Standard Community Do Not Advertise One Prepend Two Prepends Three Prepends
All Transitors 8001:1000 8001:10000 8001:10001 8001:10002 8001:10003
UUNET 8001:1001 8001:10010 8001:10011 8001:10012 8001:10013
<< Deprecated  >> 8001:1002 8001:10020 8001:10021 8001:10022 8001:10023
SAVVIS 8001:1003 8001:10030 8001:10031 8001:10032 8001:10033
BBC 8001:1004 8001:10040 8001:10041 8001:10042 8001:10043
<< Deprecated  >> 8001:1005 8001:10050 8001:10051 8001:10052 8001:10053
<< Deprecated  >> 8001:1006 8001:10060 8001:10061 8001:10062 8001:10063
AT&T 8001:1007 8001:10070 8001:10071 8001:10072 8001:10073
WV Fiber, Inc. 8001:1008 8001:10080 8001:10081 8001:10082 8001:10083

Public Peering
Standard Community Do Not Advertise One Prepend Two Prepends Three Prepends
All Public Peers 8001:2000 8001:20000 8001:20001 8001:20002 8001:20003
NYIIX 8001:2001 8001:20010 8001:20011 8001:20012 8001:20013
<< Deprecated  >> 8001:2002 8001:20020 8001:20021 8001:20022 8001:20023
<< Deprecated  >> 8001:2003 8001:20030 8001:20031 8001:20032 8001:20033
LINX 8001:2004 8001:20040 8001:20041 8001:20042 8001:20043
<< Deprecated  >> 8001:2005 8001:20050 8001:20051 8001:20052 8001:20053
Equinix Ashburn 8001:2006 8001:20060 8001:20061 8001:20062 8001:20063
TorIX 8001:2007 8001:20070 8001:20071 8001:20072 8001:20073
Equinix Newark 8001:2008 8001:20080 8001:20081 8001:20082 8001:20083
NYCX 8001:2009 8001:20090 8001:20091 8001:20092 8001:20093

Private Peering
Standard Community Do Not Advertise One Prepend Two Prepends Three Prepends
All Private Peers 8001:3000 8001:30000 8001:30001 8001:30002 8001:30003
<< Deprecated  >> 8001:3001 8001:30010 8001:30011 8001:30012 8001:30013
Cogent 8001:3002 8001:30020 8001:30021 8001:30022 8001:30023
<< Deprecated  >> 8001:3003 8001:30030 8001:30031 8001:30032 8001:30033
KDDI 8001:3004 8001:30040 8001:30041 8001:30042 8001:3003
RCN 8001:3005 8001:30050 8001:30051 8001:30052 8001:30053
Hurricane Electric 8001:3006 8001:30060 8001:30061 8001:30062 8001:30063
<< Deprecated  >> 8001:3007 8001:30070 8001:30071 8001:30072 8001:30073
Monmouth Internet 8001:3008 8001:30080 8001:30081 8001:30082 8001:30083
AboveNet 8001:3009 8001:30090 8001:30091 8001:30092 8001:30093
Cablevision/Lightpath 8001:3010 8001:30100 8001:30101 8001:30102 8001:30103
<< Deprecated  >> 8001:3011 8001:30110 8001:30111 8001:30112 8001:30113
<< Deprecated  >> 8001:3012 8001:30120 8001:30121 8001:30122 8001:30123
<< Deprecated  >> 8001:3013 8001:30130 8001:30131 8001:30132 8001:30133
<< Deprecated  >> 8001:3014 8001:30140 8001:30141 8001:30142 8001:30143
Global NAPs 8001:3015 8001:30150 8001:30151 8001:30152 8001:30153
Rogers Cable 8001:3017 8001:30170 8001:30171 8001:30172 8001:30173

Customer
Standard Community Decrease Local-Preference Standard Local-Preference Increase Local-Preference
Customer 8001:4000 8001:115 8001:120 8001:125
NYC (Telehouse - 25 Broadway, NY, NY) 8001:4001
OCT (NAC - 1719 Route 10, Parsippany, NJ) 8001:4002 One Prepend Two Prepends Three Prepends
NWR (Equinix - 165 Halsey St, Newark, NJ) 8001:4003
ADC (MFN - 8100 Boone Blvd, McLean, VA) 8001:4004 8001:1 8001:2 8001:3
LTN (Telehouse Docklands - London, UK) 8001:4005
TLW (TelX - 60 Hudson St, New York, NY) 8001:4006
SNE (Sprint - 13 Adams St, Newton, NJ) 8001:4007
ASH (Equinix - Ashburn, VA) 8001:4008
CHI (Equinix - Chicago, IL) 8001:4010

NAC Originated
Standard Community
NAC Originated 8001:5000
NYC (Telehouse - 25 Broadway, NY, NY) 8001:5001
OCT (NAC - 1719 Route 10, Parsippany, NJ) 8001:5002
NWR (Equinix - 165 Halsey St, Newark, NJ) 8001:5003
ADC (MFN, 8100 Boone Blvd, McLean, VA) 8001:5004
LTN (Telehouse Docklands, London, UK) 8001:5005
TLW (TelX - 60 Hudson St, New York, NY) 8001:5006
SNE (Sprint - 13 Adams St, Newton, NJ) 8001:5007
ASH (Equinix - Ashburn, VA) 8001:5008
TOR (RACO - Toronto, ON) 8001:5009
CHI (Equinix - Chicago, IL) 8001:5010

8001:99 Route will NOT be prepended to any transit provider.


All routes within the NAC network also carry a local preference:
45 De-Preferred Transit 
50 Standard Transit 
75 De-Preferred Peering 
80 Standard Peering 
80 Preferred Transit 
90 Preferred Peering 
115 De-Preferred Customer or NAC Originated 
120 Standard Customer or NAC Originated 
125 Preferred Customer or NAC Originated 

Example route-maps

This example shows how to deny advertisement of all customer routes to UUNET

route-map nac-out permit 10
 set community 8001:10010
!

This example shows how to prepend advertisements to Genuity two times, and to Deny advertisements to UUNET

route-map nac-out permit 10
 set community 8001:10010 8001:10052
!

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