BGP General & Community information - Colorado



General BGP Information
1. Data102 accepts up to a /24 on all announcements, and filters aggressively.
    a. this excludes Real-Time Blackhole routes, which can be sent ONLY as a /32.
    b. Customer's with multiple links and under a /24 - we will accept the smaller routes, but they will be aggregated to the Internet

2. We filter out any announcements for private IP space (bogons).

3. BGP updates can be slow, and it can take up to a minute for new routes to appear on things.

3. Looking glasses are your friend!

5. We apply hard limits to the number of routes that a customer can send us, dependent upon observed history.


BGP Settings Applied at Ingress

Route Types
 33302:1200 - customer routes
 33302:150 - transit routes
 33302:NNNN - upstream transit ASN
 33302:2NNN - City Code

Locations
 33302:2004 Denver Market (includes Colorado Springs)
 33302:2005 Philadelphia Market

Local Preference
 100 - Customer Routes (can be manipulated)
   70 - Transit routes
   71 - Exchange/private routes
   72 - Preferred Transit routes
   73 - Preferred Exchange/private routes  

Available Customer-Specified Communities

33302:666 Real Time Blackhole (only accepts /32)
33302:70 Reduce Customer's prefix' localpref from 100 to 70
33302:80 Reduce Customer's prefix' localpref from 100 to 80
33302:90 Reduce Customer's prefix' localpref from 100 to 90
65000:0 no-export, do not send to transits, customers only
65000:XXXX Do not announce routes at all to AS XXXX
65001:0 Prepend 1x to all AS
65001:XXXX Prepend 1x to AS XXXX
65002:0 Prepend 2x to all AS
65002:XXXX Prepend 2x to AS XXXX
65003:0 Prepend 3x to all AS
65003:XXXX Prepend 3x to AS XXXX


Modifiable Transit AS List
In the table above, the XXXX represents the ASN to which you can modify your traffic profile. Current supported transit ASNs are:
174 - Cogent
3356 - Level3
6461 - IX-Denver Internet Exchange (all peers)
6939 - Hurricane Electric

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