Hi again, I guess another view might be interesting: have one column per peer (with the ability to select a subset of peers, of course), a line per update, and then in each "cell" the AS path received from that peer (if any). This enables to see which path is adopted by several peers for a multihomed network. Another option would be to be able to give an AS to "grep" into the AS paths, and show which cells contain it or not (or the same thing with several ASes and colored cells). Not sure this is very clear, so I'll give an example. Let's say network N is multihomed to two transit providers AS1 and AS2. Now, I want to see which path is taken from multiple locations to this network. I would input network N, peers A, B, C, D, the two ASes AS1 and AS2 and start/end times. Then it woud output a table with columns A, B C and D, a line per update, and on each line, a different color depending on whether the route received from that peer contains AS1 or AS2 (or both, or none, maybe). Optionally, an additional column giving the proportion of peers using AS1 or AS2 could be interesting. Sounds like a good idea? Jacques. --- Jacques Caron PSINetworks Europe Network Engineer PSINet Europe Regional Peering Coordinator Planete.net IT Manager Mail: 8/10 rue Nieuport - 78140 Velizy - France Phone: +33 (0)1 34 63 19 71 - Fax: +33 (0)1 34 63 19 51