If it is full duplex you should calculate in and out utilization separately. You can combine them, but it is generally not recommended in the network management world. You can get skewed results, such as if your output utilization was pegged at 100% but your input util was basically at 0% (say for some streaming server or something), your utilization would not be "50%." That's not an accurate picture. You should probably up the bandwidth on that server.
Same goes for WAN links (well, almost all WAN links that I can think of). Fred Reimer - CCNA Eclipsys Corporation, 200 Ashford Center North, Atlanta, GA 30338 Phone: 404-847-5177 Cell: 770-490-3071 Pager: 888-260-2050 NOTICE; This email contains confidential or proprietary information which may be legally privileged. It is intended only for the named recipient(s). If an addressing or transmission error has misdirected the email, please notify the author by replying to this message. If you are not the named recipient, you are not authorized to use, disclose, distribute, copy, print or rely on this email, and should immediately delete it from your computer. -----Original Message----- From: Priscilla Oppenheimer [mailto:[EMAIL PROTECTED] Sent: Thursday, July 24, 2003 1:52 PM To: [EMAIL PROTECTED] Subject: RE: Equation to calculate the Bandwidth [7:72888] Ismail Al-Shelh wrote: > > Greeting, > > in one of groups.google threads I noticed this equation > > Util 10 MB Ethernet = ((InOctets/sec + > OutOctets/sec)*8)/10000000 > > I am wondering where can I find a document which can explain > how to > calculate the utilized bandwidth. still I do not know why he is > multiplying > by 8 and then dividing by 10,000,000 ! Multiply by 8 to get bits per second instead of bytes per second. Divide by 10 Mbps (10,000,000 bits per second) to understand what fraction of the Ethernet capacity is being used for bits in and out of this interface. Utilization is almost always specified as a fraction of capacity. (It's usally a percentage, so you could multiply by 100 to get a percentage.) I think you are confused by the 10,000,000 because it really should be 10,000,000 bits per second. (He forgot the per second?) If it's a shared Ethernet, this would only be from the point of view of this one interface, which wouldn't be the whole story. Other interfaces could be using some of the bandwidth too. If it's a switched full-duplex link, then this would be a good measurement of the utilization of the Ethernet capacity available to this interface. Priscilla > > advise please. > > > to refer to the original thread you can go to > http://groups.google.com/groups?hl=en > C%40aranea.nl&rnum=8&prev=/groups%3Fhl%3Den%26lr%3D%26ie%3DISO-8859-1%26q%3D > calculate%2Bbandwidth%2B10%2Bmbps%2B> > &lr=&ie=UTF-8&threadm=339089D4.570EBB5C%40aranea.nl&rnum=8&prev=/groups%3Fhl > %3Den%26lr%3D%26ie%3DISO-8859-1%26q%3Dcalculate%2Bbandwidth%2B10%2Bmbps%2B > > > > Ismail Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=72971&t=72888 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
