Ver. 0.7 (Dec-04-2001)
Suitable for: E-Smith 4.1.2 / Mitel SME5
Roosevelt High School, LAUSD, Los Angeles, CA
Contributors: Darrel May, Placido Sanchez, and Dan York.
Problem: You want to monitor traffic patterns of individual ports on Cisco Switches/Routers on your network.
Solution: By installing the *MRTG RPM* and following the procedure here, you will wind up with an i-bay that graphically displays traffic statistics such as, input/output per switch port in bps sampled/averaged every 5mins and graphed, hourly, daily, weekly and yearly for each of your Cisco switches and routers. For more information about MRTG or to see examples of the output, visit the MRTG Home Page. This may work on other "manageable" switches/routers if they support SNMP. An example graph of weekday traffic:
Download and install the rpm
Download MRTG RPM Here
[root@localhost]# lynx ftp://rpmfind.net/linux/redhat/7.1/en/powertools/i386/RedHat/RPMS/mrtg-2.9.6-2.i386.rpm
then type "d" to "download" and "Save-to-disk".
Then install rpm by,
Or with a recent version of RPM,
download and install simultaneously using,
create an iBay named "mrtg"
(cgi permissions not needed, just read access )
copy/paste the shell script below, name it "create-mrtg" and save in /root
(Notes: If you have only one or two devices, it may be convenient to run these commands one at a time from the root prompt. It took me 15-20mins to create all the devices for 50-60 switches we have on ours using the script below. Also checkout the MRTG site for other options available for the "indexmaker" and "cfgmaker" that would allow you to customize the presentation of the charts.)
(Tip: If you are using a Windows client to access E-Smith, It is very easy to copy/paste into a shell window.
Just open a new edit session with pico, select/copy all the "small" text below, then "right-click" inside the shell/pico window to paste, then CTRL-X, Y, to save. This works when using the command line too.)
# Create a "workdir" for this device
using the first variable
#create the cfg file for this Ip
address using the first variable (assumes community string is "public")
#Create an index.html file for this
folder using the first variable
#create an entry in script "all-ip"
to run mrtg for each device.
#Uncommenting the line below will
create a "master" index.htm inside the ibay/html directory for all devices.
#echo "<br><a href=$1/index.html> Traffic on ports of Device $1 </a>" >> /home/e-smith/files/ibays/mrtg/html/index.html
Make the create-mrtg script executable by,
[root@e-smith]# chmod 755 create-mrtg
Now run create-mrtg
EX: [root@e-smith /root]# ./create-mrtg 10001 10.0.0.1
Now run these commands once from the root prompt,
(Revised in Ver 0.2 - I found that running mrtg for 50-60 switches from crontab every five minutes caused severe thrashing of the hdd. So that they go one-by-one, a script(all-ip) will run mrtg via a cron job for each device, sequentially.)
[root@e-smith /root]# chmod 755 /etc/mrtg/all-ip
[root@e-smith /root]# mkdir -p /etc/e-smith/templates-custom/etc/crontab/
[root@e-smith /root]# echo "0-59/5 * * * * root /etc/mrtg/all-ip" > /etc/e-smith/templates-custom/etc/crontab/mrtg
[root@e-smith /root]# /sbin/e-smith/expand-template /etc/crontab
Now wait a few minutes (20 or so) and try