Re: 3750G

 You may want to do a little research on the commands and how they
actually measure things. Because "burst" in one is not equivalent to
"burst" in the other.

Scott Morris, CCIEx4 (R&S/ISP-Dial/Security/Service Provider) #4713,

CCDE #2009::D, JNCIE-M #153, JNCIS-ER, CISSP, et al.

JNCI-M, JNCI-ER

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Shahid Ansari wrote:

  rate-limit is legacy commnad but gives more flexible options for Bc than
  Police command which is not more than 1 Mb.
  Policing vs Shaping is best topic to discuss rather than Rate-limit vs
  Police : x
  
  Please rate :P
  
  Thanks
  Shahid

  On Thu, Apr 1, 2010 at 11:51 PM, naman sharma <naman.prep_at_gmail.com> wrote:

    thanks shahid, just to get more clarity. rate-limit is also another form of
    policing so how come the burst size is diff is that.
    
    naman

    On 1 April 2010 13:46, Shahid Ansari <shahid1357_at_gmail.com> wrote:

      Formula is right ..
      
      3750GSWITCH(config-pmap-c)#police 250000000 ?
        <8000-1000000> Normal burst bytes
      
      max it can go 1Mb :) only
      
      but If you try rate-limit
      
      int g0/1/10
      no switchport
      ip address x.x.x.x x.x.x.x
      rate-limit input 250000000 46875000 46875000 conform-action transmit
      exceed-action drop

      in my opinion rate-limit will do what you want ?
      
      Thanks
      Shahid

      On Thu, Apr 1, 2010 at 10:08 PM, naman sharma <naman.prep_at_gmail.com> wrote:

        Shahid,
        
        Yes i have a L3 interface in which i would be doing ingress policing. so
        in case i need to police at 250 mb on a 1 gig link. what would be the
        formula. is the same formula posted on cisco website
        
        normal burst = configured rate * (1 byte)/(8 bits) * 1.5 seconds
        
        extended burst = 2 * normal burst
        
        also can you share your configuration and what do you think will 3750G be able to police at 250 mb.
        
        thanks
        naman

        On 1 April 2010 03:01, Shahid Ansari <shahid1357_at_gmail.com> wrote:

           Nauman ,
          
          As per the calculation bc should be 46875000, which is not supported
          :),Max you can put it 1 Mb .
          If it is L3 Interface , did you tried with rate-limit ?
          In 3750G , I have done some bandwidth control for Ingress as well as
          egress traffic by using Police(Ingress) and Srr-queue (Egress) commands

          Thanks
          Shahid Ansari

            On Tue, Mar 30, 2010 at 10:20 PM, naman sharma <naman.prep_at_gmail.com> wrote:

             Hi experts,
            
            I have a 3750G switch and i am doing ingress traffic policing as it
            only
            supports that.
            
            Now i want to police my traffic at 250Mb on a 1Gig link. The problem is
            that
            the max burst capacity supported by 3750G is 1MB. now i am little
            confused.
            
            unlike shaping the buckets are not filled at regular time intervals in
            policing but are replenished in comparison to when did the last packet
            came
            and the Bc(burst) is only the depth of the bucket in which tokens are
            filled. This is when i am using single bucket logic.
            
            So would i be able to achieve my policing at 250MB even if i put my max
            burst to 1 MB. Need some help here on the logic.
            
            Thanks
            Naman

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Received on Thu Apr 01 2010 - 21:06:17 ART