I have a big question with these kind of exercises, the Majority of questions that I have seen (INE,IPexpert and Yusuf) they mostlikely want you to restrict the traffic to a certain value, but in very few cases they ask you to configure the BC TC and the other values.
I guess my question is, if not specified, what should we do, we leave it as it is? Or do we apply the values that appear on the doc? Cuz I would expect that the question would say something like, "use the values recommended" or something about the values... Mike Date: Mon, 23 Apr 2012 22:01:02 +0530 From: [email protected] To: [email protected] CC: [email protected] Subject: Re: [OSL | CCIE_Security] Formula to calculate Burst value Tc is involved in both shaping and policing. With policing, Tc is the seconds for which tokens are put in the bucket. With regards Kings On Mon, Apr 23, 2012 at 7:26 PM, Joe Astorino <[email protected]> wrote: The forumulas for calculating the Bc and Be for policing are how you have defined, them but I would be careful with the use of the term "Tc" when dealing with policing. Tc is generally a term that applies to traffic shaping and not traffic policing. Why? What does Tc do for us? With a shaper, Tc is a static defined interval of time. As you know, each Tc interval we get to add Bc tokens to the bucket to use. Traffic policing does not work the same way, contrary to popular belief. With traffic policing, the token bucket is refreshed based on a function of 2 things: The CIR value and the amount of time passed since the last packet was received. It has nothing to do with Tc. My point is simply that Tc is not involved with the calculations of traffic policing, as it is a concept that applies to traffic shaping. On Sun, Apr 22, 2012 at 12:32 PM, Kingsley Charles <[email protected]> wrote: Hi all The following is how we calculate Bc for QoS MQC policing and TCP rate-limiting. Now for ZPF policing, which formula should be used. I need Cisco doc for confirmation. Policing ======== Tc = 0.25 secs BC = CIR/8 * 0.25 = CIR/32 Be = Bc, if not specified TCP Rate-limiting ============= Tc = 1.5 secs BC = CIR/8 * 1.5 BE = 2 BC With regards Kings _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com -- Regards, Joe Astorino CCIE #24347 http://astorinonetworks.com "He not busy being born is busy dying" - Dylan _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com
_______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com
