Jacques, On Thu, 18 May 2000, Jacques Caron wrote:
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.
Sorry, yes, it's not 100% clear, so:
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).
One thing we can do is add a query with a field "AS-PATH", you enter network, peer, data and time, and the output would be something like: [...] A 193.0.0.0/8 17/11/1999 206.251.0.85 3549 1740 11127 8708 A 193.0.0.0/8 17/11/1999 193.0.0.56 3333 286 1740 11127 8708 A 193.0.0.0/8 17/11/1999 195.8.100.22 8259 5413 1740 11127 8708 A 193.0.0.0/8 17/11/1999 193.0.0.56 3333 1103 6453 1239 1785 11127 8708 [...] If you had entered "11127" as the AS path, it would select all records, if you had entered "1740 11127", then the first 3 will be highlighted, etc.
Optionally, an additional column giving the proportion of peers using AS1 or AS2 could be interesting.
Statistics (e.g. fraction of paths containing a subpath) can be derived from that. Let me know if this is what you want, if so, we'll add it to the to-do list, if not, please clarify your mail, Henk ------------------------------------------------------------------------------ Henk Uijterwaal Email: henk.uijterwaal@ripe.net RIPE Network Coordination Centre WWW: http://www.ripe.net/home/henk Singel 258 Phone: +31.20.535-4414, Fax -4445 1016 AB Amsterdam Home: +31.20.4195305 The Netherlands Mobile: +31.6.55861746 ------------------------------------------------------------------------------ A man can take a train and never reach his destination. (Kerouac, well before RFC2780).