Networking Info...
MRTG
I've received many email on how to get up and running quickly with MRTG, so here's my tips.
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Install ActiveState Perl (http://www.activestate.com)
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Download and Install MRTG (http://www.mrtg.org)
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If you don't have one, create working directory for HTML files c:\mrtg\working
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Go to c:\mrtg\bin directory
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Run perl cfgmaker snmpreadstring@ipaddress –output=filename.cfg
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Open filename.cfg with notepad
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Add RunAsDaemon: Yes
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Remove # on Options
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Add WorkDir: C:\mrtg\working
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Type wperl mrtg filename.cfg to start MRTG
SSH
Many of you asked for options to telnet when working with Cisco.
So here's a little write up.
IPERF
- Very handy FREE throughput tester. Using it is quick and easy;
- Simply download IPERF http://dast.nlanr.net/Projects/Iperf/
- Unzip into a folder on two pc's
- Go to one PC and type iperf -s at the command prompt. This is a server
- Go to the other PC and type iperf -c server_ipaddress
Other examples;
- to run the iperf utility as a server service by typing
iperf -s -D- to conduct an upload type
iperf -c server_ipaddress- to conduct a separate upload and download type
iperf -c server_ipaddress -r- to conduct a simultaneously upload and download type
iperf -c server_ipaddress -p
Other Notes;
- The following options don't work with Windows;
window (-w) * This actually affects the application read/write block or buffer size
print mss (-m)
try creating a batch file that you can schedule at whatever interval to get an idea of throughput in relation ship to time;
sample dos batch file will accept an ip address filename for output. Just make sure IPERf is in your path, or put the batch file in the iperf directory.
rem record ipaddress filename
rem ***
cls
echo off
Echo %date% %time% >> %2
Echo %date% %time%
Echo upload and download to %1
iperf -c %1 -r|find "sec" >> %2
echo ********* >> %2
Cisco Configuration
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This handy tip eliminates the common
"Translating "sohw"...domain server (255.255.255.255)" message if you make a typo.
Add the following to your config;
line vty 0 4
transport preferred none
line vty 5 15
transport preferred noneor
no ip domain-lookup
SNMP
- Please modify your default read and write SNMP community strings from public or private.
- Use the Contact and Location fields for documentation purposes.
Cabling
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MAC Address
- Get a P-Touch, type in your MAC address and put it on your laptop, desktop or troubleshooting PC. Now you'll have the correct info when you want to create a MAC address filter or just reference it.