nanog mailing list archives
Re: FIB Sizing
From: William Herrin <bill () herrin us>
Date: Sat, 25 Jul 2015 15:27:08 -0400
On Sat, Jul 25, 2015 at 7:28 AM, Baldur Norddahl <baldur.norddahl () gmail com> wrote:
When will router vendors learn to do even simple aggregation before loading routes into FIB? It appears that most hardware will have plenty of FIB space if this was done. Also that aggregated routes are increasing at a slower pace.
Howdy, You can get a good reduction with FIB aggregation, but only upwards of 50% or so, and that only with the some pretty costly algorithms. Also, you tend to get better gains at the cheaper edge nodes rather than the more expensive core nodes. For now it's more cost effective to leave the code alone and just double the size of the TCAM. Regards, Bill Herrin -- William Herrin ................ herrin () dirtside com bill () herrin us Owner, Dirtside Systems ......... Web: <http://www.dirtside.com/>
Current thread:
- FIB Sizing Graham Johnston (Jul 21)
- Re: FIB Sizing William Herrin (Jul 21)
- Re: FIB Sizing Baldur Norddahl (Jul 25)
- Re: FIB Sizing Nikolay Shopik (Jul 25)
- Re: FIB Sizing William Herrin (Jul 25)
- Re: FIB Sizing Pablo Lucena (Jul 25)
- Re: FIB Sizing Randy Bush (Jul 25)
- Re: FIB Sizing Baldur Norddahl (Jul 25)
- Re: FIB Sizing William Herrin (Jul 21)