nanog mailing list archives
Flow Based Routing/Switching (Was: "Does TCP Need an Overhaul?" (internetevolution, via slashdot))
From: Jeroen Massar <jeroen () unfix org>
Date: Sat, 05 Apr 2008 12:16:01 +0200
Paul Vixie wrote: [..]
i wouldn't want to get in an argument with somebody who was smart and savvy enough to invent packet switching during the year i entered kindergarden, but, somebody told me once that keeping information on every flow was *not* "inexpensive." should somebody tell dr. roberts?
Isn't the reason that "NetFlow" (or v10 which is the the IETF/Cisco named IPFIX) exists the side-effect of having routers doing "flow based routing" aka "keeping an entry per IP flow, thus using that entry for every next packet to quickly select the outgoing interface instead of having to go through all the prefixes" ? The flows are in those boxes, but only for stats purposes exported with NetFlow/IPFIX/sFlow/etc. Apparently it was not as fast as they liked it to be and there where other issues. Thus what exactly is new here in his boxes that has not been tried and failed before?
Greets, Jeroen
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Current thread:
- "Does TCP Need an Overhaul?" (internetevolution, via slashdot) Paul Vixie (Apr 04)
- Re: "Does TCP Need an Overhaul?" (internetevolution, via slashdot) Christopher Morrow (Apr 04)
- Re: "Does TCP Need an Overhaul?" (internetevolution, via slashdot) Steven M. Bellovin (Apr 05)
- Flow Based Routing/Switching (Was: "Does TCP Need an Overhaul?" (internetevolution, via slashdot)) Jeroen Massar (Apr 05)
- Re: Flow Based Routing/Switching (Was: "Does TCP Need an Overhaul?" (internetevolution, via slashdot)) Roland Dobbins (Apr 05)
- RE: Flow Based Routing/Switching (Was: "Does TCP Need an Overhaul?" (internetevolution, via slashdot)) Lincoln Dale (Apr 05)
- RE: Flow Based Routing/Switching (Was: "Does TCP Need an Overhaul?" (internetevolution, via slashdot)) michael.dillon (Apr 05)
- Re: "Does TCP Need an Overhaul?" (internetevolution, via slashdot) Kevin Day (Apr 05)
- Re: "Does TCP Need an Overhaul?" (internetevolution, via slashdot) Paul Vixie (Apr 05)
- Re: "Does TCP Need an Overhaul?" (internetevolution, via slashdot) Kevin Day (Apr 05)
- Re: "Does TCP Need an Overhaul?" (internetevolution, via slashdot) David Andersen (Apr 05)
- Re: "Does TCP Need an Overhaul?" (internetevolution, via slashdot) Sam Stickland (Apr 07)
- Re: "Does TCP Need an Overhaul?" (internetevolution, via slashdot) Paul Vixie (Apr 05)
- Re: "Does TCP Need an Overhaul?" (internetevolution, via slashdot) Hank Nussbacher (Apr 05)
- RE: "Does TCP Need an Overhaul?" (internetevolution, via slashdot) Charles N Wyble (Apr 05)
- Re: "Does TCP Need an Overhaul?" (internetevolution, via slashdot) Christopher Morrow (Apr 04)