Cisco 3725 router

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Dec 4th, 2008
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We have a Cisco 3725 router as our internet gateway. Verizon is our ISP. We were supposed to have our bandwidth increased from 6 to 15MB. Is there a way to confirm the actual bandwidth on the outside interface (ATM1/0.132)? The statement says 6MB.

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John Blakley Thu, 12/04/2008 - 07:43
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You can change the bandwidth statement, but that doesn't affect the speed. It's used for calculations of other things.


You could go to www.internetfrog.com to test your bandwidth. Keep in mind that there will be a slight discrepancy between your given speed and what you will measure out at based off of how far you are from the testing server and how many hops it takes to get there.


HTH,


John

Joseph W. Doherty Thu, 12/04/2008 - 07:58
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As John notes, the 6 Mbps "statement" you're seeing might just be the bandwidth statement, which may or may not reflect actual interface bandwidth. If it's incorrect, it wouldn't normally adversely impact your obtainable bandwidth. However, if it's an ATM interface, you might have a ATM "statement" that can control how fast the interface will transmit. If it is this type of statement, you might need to adjust it to obtain your maximum bandwidth.


As John also suggests, there are locations on the internet that will "clock" your maximum bandwidth. Another one is http://www.speedtest.net


It might help if you would post the portion of the config you're looking at.

Sean McCoy Thu, 12/04/2008 - 08:13
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What is the command to view the ATM statement and how would I go about changing it if needed?

Joseph W. Doherty Thu, 12/04/2008 - 08:33
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I have in mind something like "vbr-nt #### ####" under the interface's PVC section, but there are variations, which is why I wrote it would help to see the whole interface config section.

Sean McCoy Thu, 12/04/2008 - 08:52
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Is there a show command specific to the interface? I can post the output.

Joseph W. Doherty Thu, 12/04/2008 - 09:00
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You could do a "show config" or "show run" and cut out the interface portions. Or, "show run interface ATM1/0.132" (and "show run interface ATM1/0").


If there's anything you consider sensitive in what you're about to post, perhaps a desciption remark containing link's vendor circuit ID, or even IP address, just XXX out that portion. e.g. instead of ip address 192.168.5.1 255.255.255.0, ip address x.x.x.x y.y.y.y


John Blakley Thu, 12/04/2008 - 09:01
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You can do a:


sh ip int brie


and it will give you the interface and IP address, then do a:


sh run int


That will give you the complete running config section.


HTH,


John

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