North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Peering matrix information at IXPs
Hi Ricardo, >I was wondering if there is any web page with pointers to IXP's peering >matrices (such as http://www.swissix.ch/peermatrix.php)?
https://www.euro-ix.net/member/m/isp/choosing/ixplist http://www.pch.net/ixpdir/Main.pl?show_active_only=1 Also, I wanted to know how usually these matrices are built - if they are produced from IRR data, manually , or from traffic measurements? Depending on the IXP, any of the above. IRR data usually only tells you if two entities peer, it does not give details about where they peer. If they have peerings at two IXPs, you generally won't be able to know where packets pass by reading IRR data (the peering point could be specified in RPSL, but people usually do not bother to go to that level of detail when updating the IRR databases). Traffic matrices (at least up to now and AFAIK) have only been built by traffic measurements by IXPs whose switches all support sFlow. Not all switches do, so not many IXPs have that feature. Several IXPs have traffic matrices built on data entered manually. That is usually not too reliable as people forget to update the peering data after having updated their peerings on the routers. On 6/13/07, Roland Perry <[email protected]> wrote: https://www.euro-ix.net/member/m/peeringmatrix
The matrix is built on manually entered data (every IXP puts in the list of the ASes present at their site). Hope that helps! Regards, Daniele.
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