nanog mailing list archives
Re: So Philip Smith / Geoff Huston's CIDR report becomes worth a good hard look today
From: Chris Woodfield <rekoil () semihuman com>
Date: Wed, 13 Aug 2014 17:20:16 -0700
Pruning FIB entries, on the other hand, can be done quite safely as long as you're willing to accept the conversion of "null route" to "don't care." Some experiments were done on this in the IETF a couple years back. Draft-zhang-fibaggregation maybe? Savings of 30% in typical backbone nodes looked possible. That's 30% of your TCAM reclaimable.
Hence the “when programming the TCAM” part of my original statement :)
For the moment it seems to be cheaper to just build bigger TCAMs. Cheaper for the router vendors anyway.
I think of it more like “why spend development dollars on a feature that will cause my customers to keep their existing hardware longer and delay upgrades?” Yes, vendors do think like that. -C
Regards, Bill Herrin -- William Herrin ................ herrin () dirtside com bill () herrin us Owner, Dirtside Systems ......... Web: <http://www.dirtside.com/> Can I solve your unusual networking challenges?
Current thread:
- Re: So Philip Smith / Geoff Huston's CIDR report becomes worth a good hard look today, (continued)
- Re: So Philip Smith / Geoff Huston's CIDR report becomes worth a good hard look today Paul Ferguson (Aug 13)
- Re: So Philip Smith / Geoff Huston's CIDR report becomes worth a good hard look today joel jaeggli (Aug 13)
- Re: So Philip Smith / Geoff Huston's CIDR report becomes worth a good hard look today Paul Ferguson (Aug 13)
- Re: So Philip Smith / Geoff Huston's CIDR report becomes worth a good hard look today Geoff Huston (Aug 13)
- Re: So Philip Smith / Geoff Huston's CIDR report becomes worth a good hard look today Merike Kaeo (Aug 13)
- Re: So Philip Smith / Geoff Huston's CIDR report becomes worth a good hard look today Måns Nilsson (Aug 14)
- Re: So Philip Smith / Geoff Huston's CIDR report becomes worth a good hard look today Chris Woodfield (Aug 13)
- Re: So Philip Smith / Geoff Huston's CIDR report becomes worth a good hard look today William Herrin (Aug 13)
- Re: So Philip Smith / Geoff Huston's CIDR report becomes worth a good hard look today Chris Woodfield (Aug 13)
- Re: So Philip Smith / Geoff Huston's CIDR report becomes worth a good hard look today William Herrin (Aug 14)
- Re: So Philip Smith / Geoff Huston's CIDR report becomes worth a good hard look today Randy Bush (Aug 14)
- Re: So Philip Smith / Geoff Huston's CIDR report becomes worth a good hard look today William Herrin (Aug 14)
- Re: So Philip Smith / Geoff Huston's CIDR report becomes worth a good hard look today Randy Bush (Aug 14)
- Re: So Philip Smith / Geoff Huston's CIDR report becomes worth a good hard look today William Herrin (Aug 14)
- Re: So Philip Smith / Geoff Huston's CIDR report becomes worth a good hard look today Brett Frankenberger (Aug 13)
- Re: So Philip Smith / Geoff Huston's CIDR report becomes worth a good hard look today Suresh Ramasubramanian (Aug 13)
- Re: So Philip Smith / Geoff Huston's CIDR report becomes worth a good hard look today Patrick W. Gilmore (Aug 13)
- Re: So Philip Smith / Geoff Huston's CIDR report becomes worth a good hard look today manning bill (Aug 13)