Bandwidth Control Question

Bryan Heitman bryan at
Fri Dec 19 15:47:34 UTC 2003

Bandwidth Control QuestionWhy not simply use configuration option Cisco gives you to set your DS3 to 6 meg
dsu bandwidth X

Dan, your suggestion will unncessarily tax his equipment.

  ----- Original Message ----- 
  From: Dan Ellis 
  To: Claydon, Tom ; nanog at 
  Sent: Friday, December 19, 2003 9:32 AM
  Subject: RE: Bandwidth Control Question


  My suggestion is to enable the full DS3 and have each router traffic-shape to 6M on the neighboring interfaces.  Rate-limit on the input of your router to disallow the customer from sending you more than the limit.  Remember that for the most part rate-limiting polices, where traffic shaping performs more buffering and shaping.  That's why you should use the combo of a shape on the sender side and a police on your side to protect.



  Daniel Ellis, CTO, PenTeleData


       "The only way to predict the future is to invent it."

                                                    --Alan Kay

  -----Original Message-----
  From: Claydon, Tom [mailto:Tom.Claydon at] 
  Sent: Friday, December 19, 2003 10:26 AM
  To: 'nanog at'
  Subject: Bandwidth Control Question


  A customer of ours in the next building would like 6M of Internet bandwidth from us, so we would wire a DS3 between the two buildings for connectivity.

  The question is: how to we control the amount of bandwidth that we give them? Could we use rate limiting to contain the bandwdith to 6M, our would we need to get external IDSU's to do that?

  Note: we have a Cisco 7206VXR router on our end. The customer has a Cisco 7513. 

  = TC 
  Tom Claydon, IT/ATM Network Engineer 
  Dobson Telephone Company 
  phone: (405) 391-8201  cell: (405) 834-0341 
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