nanog mailing list archives
Re: "Tactical" /24 announcements
From: Adam Thompson <athompson () merlin mb ca>
Date: Mon, 9 Aug 2021 16:13:10 +0000
Yes, it is bad practice. Yes, it's polluting the route table. If the # of /24s involved is not ridiculously large (say, <64?) them I would go ahead, as long as IRR and/or RPKI are also updated. Obviously if everyone did it (i.e. advertising /24s exclusively) then our FIBs would collectively balloon to a grotesquely un-manageable size, at least on platforms that can't auto-aggregate that back down. Thankfully, everyone isn't doing it. I, too, would vastly prefer no-one did this, but I have two customers that demand it from time to time... and we've even done it for our own allocation sometimes, and there's no robust, never mind bullet-proof, technical argument why I can't do that for them (or for ourselves). OTOH robust arguments exist for why it's a good thing to do - sometimes, and temporarily. ¯\_(ツ)_/¯ -Adam Adam Thompson Consultant, Infrastructure Services [1593169877849] 100 - 135 Innovation Drive Winnipeg, MB, R3T 6A8 (204) 977-6824 or 1-800-430-6404 (MB only) athompson () merlin mb ca<mailto:athompson () merlin mb ca> www.merlin.mb.ca<http://www.merlin.mb.ca/> ________________________________ From: NANOG <nanog-bounces+athompson=merlin.mb.ca () nanog org> on behalf of Billy Croan <BCroan () unrealservers net> Sent: August 9, 2021 10:47 To: nanog list <nanog () nanog org> Subject: "Tactical" /24 announcements How does the community feel about using /24 originations in BGP as a tactical advantage against potential bgp hijackers? All of our allocations are larger and those prefixes we announce for clients as well usually are. But we had a request recently to originate everything as distinct /24 prefixes, to reduce the effect of a potential bgp hijack. It seemed a little bit like a tragedy of the commons situation. Is this seen as route table pollution, or a necessary evil in today's world? How many routers out there today would be affected if everyone did this? Are there any big networks that drop or penalize announcements like this?
Current thread:
- "Tactical" /24 announcements Billy Croan (Aug 09)
- Re: "Tactical" /24 announcements Martijn Schmidt via NANOG (Aug 09)
- Re: "Tactical" /24 announcements Saku Ytti (Aug 09)
- Re: "Tactical" /24 announcements William Herrin (Aug 09)
- Re: "Tactical" /24 announcements Masataka Ohta (Aug 09)
- Re: "Tactical" /24 announcements William Herrin (Aug 09)
- Re: "Tactical" /24 announcements Sabri Berisha (Aug 09)
- Re: "Tactical" /24 announcements William Herrin (Aug 09)
- Re: "Tactical" /24 announcements Masataka Ohta (Aug 10)
- Re: "Tactical" /24 announcements Masataka Ohta (Aug 09)
- Re: "Tactical" /24 announcements Amir Herzberg (Aug 09)
- Re: "Tactical" /24 announcements Martijn Schmidt via NANOG (Aug 09)
- Re: "Tactical" /24 announcements Adam Thompson (Aug 09)
- Re: "Tactical" /24 announcements Hank Nussbacher (Aug 09)
- Re: "Tactical" /24 announcements Tom Beecher (Aug 09)
- Re: "Tactical" /24 announcements Rabbi Rob Thomas (Aug 09)
- Re: "Tactical" /24 announcements Mark Tinka (Aug 10)
- Re: "Tactical" /24 announcements Tom Hill (Aug 11)
- Re: "Tactical" /24 announcements Mark Tinka (Aug 11)
- Re: "Tactical" /24 announcements Tom Beecher (Aug 09)
- Re: "Tactical" /24 announcements Baldur Norddahl (Aug 09)
- Re: "Tactical" /24 announcements Robert McKay (Aug 09)