[mrtg] Re: Another T1 usage question.

Jay Hennigan jay at west.net
Wed May 24 01:55:31 MEST 2000

On Tue, 23 May 2000, Ed Bonham wrote:

> We have three T1's we are monitoring.  On the graph, the Y axis goes up to
> 200.  Are the usage percentages based on 200, or the max bandwith of a T1.
> Our T1's show they are topping out at 154.2 kB/s with a percentage of 79.9.
> If my math is correct, 154.2 is a lot more than 79.9 percent of the max T1.
> I guess my question basically boils down to this.  If our T1 is maxing out
> at 154.2, is that the max our T1 can do??

You're using Bytes, so the max payload for your T1 is 192 kBytes.
Some may say 193, but it's really 192 because of framing overhead.

64Kbits/ch = 8KBytes x 24 channels = 192 kBytes + 1kByte overhead = 193K.

154.2 is indeed 79.9% of 193.  

Jay Hennigan  -  Network Administration  -  jay at west.net 
NetLojix Communications, Inc.  NASDAQ: NETX  -  http://www.netlojix.com/
WestNet:  Connecting you to the planet.  805 884-6323 

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