Rate-Limit

[Manoel Goncalves]

Hi, 

I have a 10MB link and the carrier limits the band using rate-limit. There are many falls of this circuit. Could you check if the Burst configuration of the rate-limit is suitable for 10MB speed?

The carrier limits the traffic of 10MB using the configuration below:

  Rate-limit input rate 10240 burst 512 (Kbyte)

Thanks,

[Georg Pauwen]

Hello,

Cisco has a formula for this:

Normal Burst = CAR X (1/8) x 1.5

Accoring to this formula, your burst should be 1920.

[Manoel Goncalves]

Hello, 

Should I set up the burst with 1920 Kbyte? 

Thanks,

[Georg Pauwen]

Hello,

1920 is the burst based on the Cisco recommendation. Go ahead and configure it, but keep in mind that it is just that, a general recommendation. Once configured, check what traffic conforms and is exceeded on the interface where the rate limit is configured with the 'show interfaces rate-limit command.

[Joseph W. Doherty]

"Suitable" for how or for what?

Minimally, Bc should allow at least 1 MTU sized packet.  (I suspect a 512 KB Bc supports that.)

Ideally, Bc might also support half the BDP.