* * * * *
                                        
                                   More Paths
                                        
We control IP (Internet Protocol) addresses XXX.YYY.224.0 through
XXX.YYY.239.255 and as I mentioned [1], not all the addresses in that range
follow the same path from my home computer to the office. I was curious so I
decided to map the paths:

[The various paths of a /20 routing block] [2] 

This image shows the overall paths, with the double circles the termination
points of the various IPs and as far as I can tell, it looks like the “/20”
we have is being routed as 16 individual “/24” networks (aka (also known as)
“Class-C”) through out different providers (some through one, some through
the other).

Curiouser and curiouser … 

Update on Thursday, September 15^th, 2005

Smirk emailed a response to this post:

> **From:** Smirk <XXXXXXXXXXXXXXXX>
>  **To:** Sean Conner <sean@conman.org>
>  **Subject:** bandwidth mystery
>  **Date:** Thu, 15 Sep 2005 03:35:54 EDT 
> 
> I think if you check with Dan, we are routing various IP's with preferences
> for different carriers in order to have our actual bandwidth usage line up
> with our financial commitments to our carriers.
> 
> Perhaps that may solve the mystery?
> 

Perhaps.


[1] gopher://gopher.conman.org/0Phlog:2005/09/14.1
[2] gopher://gopher.conman.org/IPhlog:2005/09/14/superroute.png

Email Sean Conner at sean@conman.org

.