[c-nsp] BGP routes: 207k + 157k = 238k ???...

[Tony Li]

On Jan 24, 2008, at 7:22 PM, Deepak Jain wrote:

> In your opinion, is there any downside to this behavior  
> operationally (other than the time it takes for a unadvertised  
> route to present itself  in the event the advertised route is  
> withdrawn?)?


Other than that, Mrs. Lincoln, how was the play?

;-)


The advantage to that behavior is that it helps reduce the state  
involved.  If all iBGP speakers advertise all routes, then you end up  
with tables the size of (# of routes) * (# of BGP speakers) at every  
speaker.  While this might not seem like a lot, consider the case of  
Tier 1 SPs who have 240k routes (+ internal routes) times 500 or so  
BGP speakers.

DRAM is cheap, but it's not free.

Tony