nanog mailing list archives
Re: "Tactical" /24 announcements
From: Mark Tinka <mark@tinka.africa>
Date: Sat, 14 Aug 2021 07:56:51 +0200
On 8/12/21 19:30, Nick Hilliard wrote:
it also causes non-deterministic fib resource consumption. On most edge deployments this won't matter, but it wouldn't be hard to cook up a topology that could fail in interesting ways. Overall fib compression is a net win, but you need to be careful with it.
We only needed it on boxes with a small FIB, to begin with. We don't use this on large routers with millions of FIB slots to spare.
The challenge on small boxes is that at some point, even with the FIB filtering, you will run out of FIB slots, and then weird things start happening.
At that point, dumping the box and going for something larger (say, dropping a 20,000 FIB box and going for a 256,000 FIB box) is your only real option. It's still cheaper than a large box with lots more FIB, and you can continue the benefits of FIB filtering without causing weird problems in the network.
Mark.
Current thread:
- Re: "Tactical" /24 announcements, (continued)
- Re: "Tactical" /24 announcements Jeff Tantsura (Aug 14)
- Re: "Tactical" /24 announcements Masataka Ohta (Aug 15)
- Re: "Tactical" /24 announcements Sabri Berisha (Aug 13)
- Re: "Tactical" /24 announcements Jon Lewis (Aug 12)
- Re: "Tactical" /24 announcements Mark Tinka (Aug 13)
- Re: "Tactical" /24 announcements Jon Lewis (Aug 12)
- Re: "Tactical" /24 announcements Tom Hill (Aug 12)
- Re: "Tactical" /24 announcements Nick Hilliard (Aug 12)
- Re: "Tactical" /24 announcements Jon Lewis (Aug 12)
- Re: "Tactical" /24 announcements Mark Tinka (Aug 13)
- Re: "Tactical" /24 announcements Mark Tinka (Aug 13)
- Re: "Tactical" /24 announcements Mark Tinka (Aug 13)
- Re: "Tactical" /24 announcements Mark Tinka (Aug 11)
- Re: "Tactical" /24 announcements Saku Ytti (Aug 14)
- Re: "Tactical" /24 announcements Mark Tinka (Aug 15)
- RE: "Tactical" /24 announcements Jakob Heitz (jheitz) via NANOG (Aug 16)
- Re: "Tactical" /24 announcements Randy Bush (Aug 16)
- Re: "Tactical" /24 announcements Saku Ytti (Aug 16)
- Re: "Tactical" /24 announcements Tim Raphael (Aug 17)
- Re: "Tactical" /24 announcements Randy Bush (Aug 17)