[c-nsp] Which IP's belong to AS1234?

[Ian MacKinnon]

Hi Andy,

Does your device support netflow? That is the best answer for this sort of question.

If it does not, can you mirror the traffic to say a server and run ntop on that?

Ian

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Andy Saykao
Sent: 25 September 2009 09:12
To: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] Which IP's belong to AS1234?

Thanks for the reply guys.

What I'm trying to achieve is to monitor the bandwidth utilization on
our Internet link. So for example we want to know how much bandwidth is
being utilized by our customers so we can say "ah huh out of our 100M
internet link, 90M of traffic is from youtube.com, so let's ask Google
if they want to peer with us".

The device we are using refers to the Internet as the external network.
The device does not keep records of IP address information from the
external network, but we can specify classes under the external network.
So I could create a class called YouTube and associate the IPs 1.2.3.4
to 5.6.7.8 to this class and place it under the external network. The
device is then able to report that the YouTube class consumed X amount
of bandwidth on the external network interface. This is probably not the
best way to go about it, but that's the limitation of the device.

This is why I needed to know what IP blocks belong to AS1234, so I could
find out how much traffic was actually coming from AS1234 on our
Internet link.

Cheers.

Andy

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