From: Stephen Oliver (stevie_oliver@xxxxxxxxxxx)
Date: Fri Dec 07 2001 - 06:39:16 GMT-3
1.544Mbps is just a historical thing for serial links. If you want accurate
metrucs you need to reflect the clocking of the interface in the bandwidth
statement. As you thought the bandwidth is in kbps so 1300000 clock rate is
1300kbps hence use
# bandwidth 1300
You need to set bandwidth on serial links to get an accurate metric.
Stevie.
>From: "Larson, Chris (Contractor)" <Chris.Larson@ed.gov>
>Reply-To: "Larson, Chris (Contractor)" <Chris.Larson@ed.gov>
>To: "'Thomas Larus'" <tlarus@mwc.edu>, ccielab@groupstudy.com
>Subject: RE: "clock rate 1300000." What is the bandwidth, and why can't y
>ou set it to something closer to the default BW on fast serial interfaces
>?
>Date: Thu, 6 Dec 2001 15:01:40 -0500
>
>Actually we have a 12.1(2)T on a 3640 that reports the serial interface
>bandwidth is 2048(E1 speeds). Of course we don't get E1's here in the U.S.
>and it is a regular T and the Bandwidth parameter was never changed. I
>cannot explain the discrepency except that this parameter has nothing to do
>with actual bandwidth and is only used to affect routing metrics or costs
>so
>you should set it to however you want your metrics that use the bandwidth
>parameter to see the link.
>
>
>
>
>-----Original Message-----
>From: Thomas Larus [mailto:tlarus@mwc.edu]
>Sent: Thursday, December 06, 2001 2:41 PM
>To: ccielab@groupstudy.com
>Subject: "clock rate 1300000." What is the bandwidth, and why can't you
>set it to something closer to the default BW on fast serial interfaces?
>
>
>The default bandwidth on the serial interfaces on 2500s is 1.544 mbps.
>However, when you set the clock rate, the closest value is 1300000.
>Could someone please explain the discrepancy? Clock rate 64000 gives
>you bandwidth of 64000 mbps. If I use clock rate 1300000, what should
>I put down as the bandwidth of the interface? 1300?
>
>The IOS 12.1 docs on the clock rate command does not explain this.
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