nanog mailing list archives
Re: SDN Internet Router (sir)
From: Matthew Walster via NANOG <nanog () nanog org>
Date: Sun, 8 Jan 2023 00:40:37 +1100
On Sat, 7 Jan 2023, 20:52 Masataka Ohta, <mohta () necom830 hpcl titech ac jp> wrote:
Matthew Walster wrote:No... It's action based. You can send it a different route, you can replicate it, you can drop it, you can mutate it...Replication is a poor alternative for multicast.
You conveniently ignore things like IDS, port mirroring, things like that. For other actions, why, do you think, they are performed?
Just for fun? Or to differentiate treatment of some packets, that is, prioritization?
No. There are far more actions than for prioritisation. What if you want to make sure certain classes of traffic do not flow over a link, because it is unencrypted and/or sensitive, but you're happy to send as much TLS wrapped data as you like? What if you want to sample some flows in an ERSPAN like mechanism? What if you want to urgently drop a set of flows based on a known DDOS signature?
You can send it to adifferent destination for stateful filtering when it doesn't match an expected pattern!Unless pattern is as simple as having certain port number, stateful filtering almost always needs all packets including those matching expected pattern, I'm afraid.
Or a certain set of IP addresses. Policy based routing.
SDN is not just QoS routing, please stop saying that. See above.Nope, not true. Had 1000 routes, only 100 available in FIB. So you filter to the top 50 doing traffic and default route the rest of the traffic.Lessentries.If default route is acceptable, just rely on it along with 50 non default routes with plain IP routers.
That's what OP is suggesting. That's what SIR is. Classifying prefixes by traffic and only keeping the ones with the highest volume of traffic, discarding the rest, relying on the default route to infill. M
Current thread:
- Re: SDN Internet Router (sir), (continued)
- Re: SDN Internet Router (sir) Mel Beckman (Jan 03)
- Re: SDN Internet Router (sir) Mike Hammett (Jan 03)
- Re: SDN Internet Router (sir) Mike Hammett (Jan 03)
- Re: SDN Internet Router (sir) Tom Beecher (Jan 04)
- Re: SDN Internet Router (sir) Christopher Morrow (Jan 04)
- Re: SDN Internet Router (sir) Masataka Ohta (Jan 06)
- Re: SDN Internet Router (sir) Matthew Walster via NANOG (Jan 06)
- Re: SDN Internet Router (sir) Masataka Ohta (Jan 06)
- Re: SDN Internet Router (sir) Matthew Walster via NANOG (Jan 06)
- Re: SDN Internet Router (sir) Masataka Ohta (Jan 07)
- Re: SDN Internet Router (sir) Matthew Walster via NANOG (Jan 07)
- Re: SDN Internet Router (sir) Masataka Ohta (Jan 07)
- Re: SDN Internet Router (sir) Mike Hammett (Jan 10)
- Re: SDN Internet Router (sir) Mike Hammett (Jan 10)
- Re: SDN Internet Router (sir) Masataka Ohta (Jan 11)
- Re: SDN Internet Router (sir) Mike Hammett (Jan 11)
- Re: SDN Internet Router (sir) John Osmon (Jan 11)
- Re: SDN Internet Router (sir) Mel Beckman (Jan 03)
- Re: SDN Internet Router (sir) Mike Hammett (Jan 05)
- Re: SDN Internet Router (sir) Tom Beecher (Jan 05)
- Re: SDN Internet Router (sir) Mike Hammett (Jan 05)
- Re: SDN Internet Router (sir) Mike Hammett (Jan 05)