vBNS
Portion of the MBGP Topology Reachable via vBNS
The vBNS infrastructure is very important specially to us, the folks in ".edu" domains. The following map displays all the ASes that reachable from "FIXW" only via vBNS. The view presented represents the snapshot of topology taken on the 14th of September 1999.

More Info:
Larger, all-AS-names-readable, Image
Statistics about the portion of the topology reachable via vBNS
Statistics about the lengths of the net-masks of the networks reachable via vBNS.
What does the color encoding in this map signify?


Gyaaraa-time-stamped-viewes.gif (28238 bytes)
All the ASes reachable from FIXW-MBone via vBNS on 09/14/1999

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Gyaaraa-time-stamped-viewes.gif (28238 bytes)

All the ASes reachable from FIXW-MBone via vBNS on 09/14/1999

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What does the color encoding in this map signify?

The nodes are color coded on the basis of their fanout, i.e. the color of each of the node signifies how many AS' is it peering with. In simple words how many edges out of each node :).
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Portion of Topology Rechable Via vBNS:
The following graph displays the statistics, derived from the same MBGP table that the above view was extracted from, comparing the total number of ASes and Networks (as advertised in the MBGP table) with that of those reachable via vBNS.

misc-vbns-statistics.gif (7044 bytes)

Portion of Topology Rechable Via vBNS


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Statistics About the Net Masks of the Networks:
Routes advertised via MBGP, are the routes to networks. The size of the network block is determined by the mask length. While mask 32 => a single host, mask 0 => entire internet [ including the machine where you are right now :) ]. Mask-32's in MBGP tables are *not* not good. Mask-24's are most common (well supposedly).

misc-vbns-statistics.gif (7044 bytes)

Statistics Regarding the Net Mask Length


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Comments and Suggestions:  <prash@caida.org>

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