Tim's discussion below is my understanding of CIR as well. Further to that, I'd like to add the following comments which are my understanding of the financial implications of CIR (however I could be wrong). CIR discussion (the financial aspect): I've also found that there's considerable cost implications with a CIR as well. For instance, we're using an MCI frame network in the U.S. We are charged per megabyte for this. I had always wanted 0K CIR, knowing of course, that MCI's network will be over-engineered, and I'll get the data through. It turns out, that this isn't necessarily the cheapest. MCI has different charges for sending your data, for instance 0K CIR is X$/megabyte 16K CIR is Y$/megabyte up to your CIR (where Y > X) 16K CIR is Z$/megabyte beyond your CIR (where Z << X) If you have little data, then the 0K is cheapest. If you have a lot of data, then you'd better order some CIR, as the X$ per megabyte will add up to a lot more than the Y$+Z$ per megabyte. Not only that, but there's a cap on the maximum if you have 16K CIR, while I doubt if there's a cap on 0K CIR. I wish I could throw in the real $$$ figures to demonstrate, as we're going to convert from 0K to 16K for most of the branches. In conclusion, be careful when ordering up your CIR. 0K is not necessarily the cheapest. Andrew Tuline (CCNA, CCDP) (PS, hey did you see me mentioned in the Fritz Nelson's article in the Linux Issue of Network Computing recently.) -----Original Message----- From: Tim O'Brien [mailto:[EMAIL PROTECTED]] Sent: Friday, July 14, 2000 12:17 PM To: Taylor, Don; 'Vic Feferberg'; [EMAIL PROTECTED] Subject: Re: cir, bc, be I thought that when you purchased bandwidth, the CIR that you purchased was the minimum guaranteed amount of bandwidth that the provider had to make available to you? If you bought a T1 with a 128K CIR you would always have at least 128K available to you no matter how much traffic was on their Frame network and you would be able to burst to ~1.5Mbps, provided that their network was not saturated, correct? Tim ----- Original Message ----- From: "Taylor, Don" <[EMAIL PROTECTED]> To: "'Vic Feferberg'" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]> Sent: Friday, July 14, 2000 2:37 PM Subject: RE: cir, bc, be CIR is the average speed you'll transmit overall. In addition to this, you can burst (Bc) up to, in your example, another 128K (256K total) for a predefined period of time (usually about 1 second). Be designates all those packets above the Bc; these are marked DE and will be discarded if congestion occurs. - Don -----Original Message----- From: Vic Feferberg [mailto:[EMAIL PROTECTED]] Sent: Friday, July 14, 2000 2:24 AM To: [EMAIL PROTECTED] Subject: cir, bc, be I'm having trouble getting my head around how bc and be relate to cir. For example, if all 3 are set to 128k, is bc included in cir, or is it additional to cir. etc, etc. TIA ___________________________________ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] **************************************************************************** * The information in this email is confidential and may be legally privileged. It is intended solely for the addressee. Access to this email by anyone else is unauthorized. If you are not the intended recipient, any disclosure, copying, distribution or any action taken or omitted to be taken in reliance on it, is prohibited and may be unlawful. When addressed to our clients any opinions or advice contained in this email are subject to the terms and conditions expressed in the governing KPMG client engagement letter. **************************************************************************** * ___________________________________ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] ___________________________________ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] ___________________________________ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
