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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Ping flooding (fwd)
On Jul 9, 17:57, "Daniel W. McRobb" <[email protected]> wrote: > The sampling Curtis mentioned on the NSS routers is a bit different. > For one, it doesn't really impact forwarding performance (and hopefully, > if/when implemented on the Bay, will not impact forwarding performance). Not to pick nits, but what I quoted was a cache snapshot; caches don't impact performance under normal circumstances, though their construction may do so. > But what we're specifically looking for in terms of continuous sampling > (such as that we do on the NSS routers) is a net matrix... if you > changed the Cisco flow switching stuff to use network numbers (and > mask), you'd have something very much like what we're looking for in > terms of continuous sampling. From there we build AS matrices, etc. Yes ... but you shouldn't need anything special for that. We have been doing the same for a long time, using regular IP accounting on the edge routers, which is then summarised over a full routing table. The only discrepancies that occur are if changes in routing occur between the time of accounting and processing, but this tends not to be a problem. > The other thing about the flow-switching data that's different than the > NSS (and probably what we'll get from Bay) is that there aren't really > any nice ways of retrieving/storing the data automatically. This used to be true, but "probably" isn't true any longer. -- ------ ___ --- Per G. Bilse, Mgr Network Operations Ctr ----- / / / __ ___ _/_ ---- EUnet Communications Services B.V. ---- /--- / / / / /__/ / ----- Singel 540, 1017 AZ Amsterdam, NL --- /___ /__/ / / /__ / ------ tel: +31 20 6233803, fax: +31 20 6224657 --- ------- 24hr emergency number: +31 20 421 0865 --- Connecting Europe since 1982 --- http://www.EU.net e-mail: [email protected] - - - - - - - - - - - - - - - - -
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