On Tue, Feb 05, 2013 at 05:33:51PM +0530, kulbhushan Sharma wrote: > I have some clarification regarding total bandwidth occupied. As an example > one of my link total Bandwidth is 34 MB (E3 link). When i generate graphs > the inbound baandwidth it shows 22.34 Mbps (example) and outbound bandwidth > as 27.23 Mbps. Now if i notice that total traffic Bandwidth increases more > than what is available which in turn shows the Utilization increasing more > than 100%; which i am not been able to understand. Can any one of you > explain what is the reason behind this or there is some problem with the > configuration parameters. Total bandwidth comes from a SNMP get, specifically the ifTable ifSpeed entry for that interface. A lot of devices mis-report this value, so first check that it is correct. Also at least in Cisco devices you can set it with the bandwidth command.
You have to be careful not confusing the bandwidth, or speed, which is a (generally) fixed value out of ifSpeed with an input or output rate, which is the delta of ifInOctects or ifOutOctects multiplied by 8. So an E3 has a bandwidth of 34 Mbps, I think you're saying you are seeing an output or input over this amount though both your examples are below this. This would be surprising for two reasons; the first being that JFFNMS has a clamp to stop that and the second is the SNMP device should report that sort of figures. It wouldn't be the first time that's happened: lots of people have been fooled by Cisco 6500s and SVIs with their bizzare numbers. - Craig -- Craig Small VK2XLZ http://enc.com.au/ csmall at : enc.com.au Debian GNU/Linux http://www.debian.org/ csmall at : debian.org GPG fingerprint: 5D2F B320 B825 D939 04D2 0519 3938 F96B DF50 FEA5 ------------------------------------------------------------------------------ Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis & visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter _______________________________________________ jffnms-users mailing list jffnms-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jffnms-users
