nanog mailing list archives
Re: Partial vs Full tables
From: William Herrin <bill () herrin us>
Date: Mon, 8 Jun 2020 10:53:07 -0700
On Sun, Jun 7, 2020 at 11:07 PM Saku Ytti <saku () ytti fi> wrote:
I'll take my imagination boat from the dry docks and sail to 2035. Lot of people still run Jericho ANET, it is the new CAT6500 PFC3. DFZ won't fit it anymore without redundant-specifics. Are we at all concerned that someone in the DFZ advertises a minimum set of prefixes needed to force decompression and if we are, how do we protect from it, if we are not, why are we not?
Limit announcements to /24: 2^24 max routes. Subtract: 0.0.0.0/8, 10.0.0.0/8, 127.0.0.0/8, 224.0.0.0/3 and some other reserved networks that don't (or at least aren't supposed to) show up in the DFZ. Leaves around 14M routes in the table at full disaggregation to /24. Current TCAM-based equipment supports 1M - 2M routes. The tech readily scales 7x just by throwing hardware at it (no redesign). Trie-based equipment already supports 14M routes with sufficient DRAM and CPU (4 gigs and 2 cores is more than sufficient for a 1 gbps router at the current 800k routes). And that's the worst case. The IPv4 table will surely saturate and stabilize long before 14M routes. No crisis to avert. Just keep up with your upgrade schedules. Regards, Bill Herrin -- William Herrin bill () herrin us https://bill.herrin.us/
Current thread:
- Re: Partial vs Full tables, (continued)
- Re: Partial vs Full tables Mark Tinka (Jun 09)
- Re: Partial vs Full tables Job Snijders (Jun 10)
- Re: Partial vs Full tables Mark Tinka (Jun 11)
- Re: Partial vs Full tables Tore Anderson (Jun 05)
- Re: Partial vs Full tables William Herrin (Jun 05)
- Re: Partial vs Full tables Yang Yu (Jun 05)
- Re: Partial vs Full tables William Herrin (Jun 05)
- Re: Partial vs Full tables Ryan Woolley (Jun 07)
- Re: Partial vs Full tables Saku Ytti (Jun 07)
- Re: Partial vs Full tables Baldur Norddahl (Jun 08)
- Re: Partial vs Full tables William Herrin (Jun 08)
- Re: Partial vs Full tables Nick Hilliard (Jun 08)
- Re: Partial vs Full tables Joe Greco (Jun 08)
- Re: Partial vs Full tables William Herrin (Jun 08)
- Re: Partial vs Full tables Mike Hammett (Jun 08)
- Message not available
- Re: Partial vs Full tables William Herrin (Jun 08)
- Re: Partial vs Full tables Josh Hoppes (Jun 08)
- Re: Partial vs Full tables Anoop Ghanwani (Jun 08)
- Re: Partial vs Full tables Saku Ytti (Jun 08)
- Re: Partial vs Full tables Mike Hammett (Jun 06)
- Re: Partial vs Full tables Mark Tinka (Jun 09)