Product : Linux
Part Involved : Red Hat
Summary: Installation of Red Hat Linux distribution.
Scenario : The installation procedure has been installed over virtual Machine (using VmWare).
Company : owner.
Reference Date : February 2008.
The overall procedure to install Red Hat over VmWare has been uploaded into next links :
Part 1 : Http://www.youtube.com/watch?v=x6MpBPIVqho
Part 2 : http://www.youtube.com/watch?v=mjCHSBK2lEw
Part 3 : http://www.youtube.com/watch?v=_nd3brZC86A
Part 4 : http://www.youtube.com/watch?v=Oa_wphK8MW0
Relax, if your bandwidth or your hardware does not permit check the videos, then send me an e-email and I will replay you with the videos or in the last instance I would up load in some server with access in internet to download that files.
jueves, 21 de febrero de 2008
lunes, 21 de enero de 2008
Troubleshooting LAN connections
Product : Links connections are bouncing.
Part Involved : LAN
Summary : The purveyor has installled three new data LAN ports close to magnetic resonance scanner
Scenario : Personnel of Computing office suspects about the field emitted of magnetic resonance scanner.
Company : The National Cancer Institute of Peru (INEN).
Reference Date : January 2008.
After the installation of the three LAN data ports the purveyor proceeded to testing the structured cabling related to these points and all of them passed successfully. That was a dark threshold to find the seed core of the problem. The simple tests did by personnel of computing office using the ping command throw that the connection was not solid, the time of response vary from time to time with not appearently some type of pattern related to it, then it started to suspects about the RF emitted of magnetic resonance scanner. The structured cabling was based on CAT6 and up to here there is no more evidences available to establish a technical diagnostic.
I have downloaded and installed a software tool to measure the bandwidth http://germanmedinavirtual.blogspot.com/2008/01/iperf-measuring-your-bandwidth.html between the LAN data port with problems and another pc at the other side of the networking structure -last one without problems-, then I begun to collect samples of connection between these two LAN data ports, one with the response time of the ping command and at the same time measuring the bandwidth using Iperf. Then the next video shows this process http://www.youtube.com/watch?v=mgKOd2eTLuU and the results gets while the software applications are executed querying to database , for example in this case the average of the bandwidth obtained reached 68MBits/Sec (too low).
Part Involved : LAN
Summary : The purveyor has installled three new data LAN ports close to magnetic resonance scanner
Scenario : Personnel of Computing office suspects about the field emitted of magnetic resonance scanner.
Company : The National Cancer Institute of Peru (INEN).
Reference Date : January 2008.
After the installation of the three LAN data ports the purveyor proceeded to testing the structured cabling related to these points and all of them passed successfully. That was a dark threshold to find the seed core of the problem. The simple tests did by personnel of computing office using the ping command throw that the connection was not solid, the time of response vary from time to time with not appearently some type of pattern related to it, then it started to suspects about the RF emitted of magnetic resonance scanner. The structured cabling was based on CAT6 and up to here there is no more evidences available to establish a technical diagnostic.
I have downloaded and installed a software tool to measure the bandwidth http://germanmedinavirtual.blogspot.com/2008/01/iperf-measuring-your-bandwidth.html between the LAN data port with problems and another pc at the other side of the networking structure -last one without problems-, then I begun to collect samples of connection between these two LAN data ports, one with the response time of the ping command and at the same time measuring the bandwidth using Iperf. Then the next video shows this process http://www.youtube.com/watch?v=mgKOd2eTLuU and the results gets while the software applications are executed querying to database , for example in this case the average of the bandwidth obtained reached 68MBits/Sec (too low).
Taking this reference it is clear way that there is a considerable loss detected into the link, the next step was to identify what device is causing this efffect and that was focused into some switch previous to the main switch close to telecommunication room; after it was replaced then the process to collecting samples from the link connection was repeated again such as I show at http://www.youtube.com/watch?v=xLiCfB8N06c reading a considerable differences of the bandwidth up to 93 MBits/Sec.
Here is, another case resolved.
viernes, 11 de enero de 2008
Installing Panda Console
Product : AntiVirus
Part Involved : Panda Console
Summary: The console does not download the agent and can not connect with the clients computers on LAN.
Scenario : There is a big range of clients computers without virus software updated .
Company : The National cancer Institute of Peru. (INEN)
Reference Date : January 2008.
I asked to purveyor to reinstall again the console application and they accepted my idea but they suggested too : Do not touch database antivirus plattaform or additionally instance related to it, then under the title "YouTube videos hosted by German Medina" with title "Installing Panda Console", you will find, the process filed. But this task does not resolved yet: (a) the download automation of the agent into console, (b) the update of the agent process in every client computer.
Part Involved : Panda Console
Summary: The console does not download the agent and can not connect with the clients computers on LAN.
Scenario : There is a big range of clients computers without virus software updated .
Company : The National cancer Institute of Peru. (INEN)
Reference Date : January 2008.
I asked to purveyor to reinstall again the console application and they accepted my idea but they suggested too : Do not touch database antivirus plattaform or additionally instance related to it, then under the title "YouTube videos hosted by German Medina" with title "Installing Panda Console", you will find, the process filed. But this task does not resolved yet: (a) the download automation of the agent into console, (b) the update of the agent process in every client computer.
viernes, 4 de enero de 2008
Iperf : Measuring your bandwidth (1)
Product : Iperf
Part Involved : Measure of bandwidth
Summary: Into my LAN connections, I want to measure the bandwidth between two data ports of my LAN.
Scenario : Troubleshooting and detect what type of applications executed into pc spends more networking resources.
Company : The National Cancer Institute of Peru (INEN).
Reference Date : January 2008.
After several tries of testing then I recomend you this excelent tool to follow and measure your bandwidth between two LAN locations designated by you.
1.- The executable file can be downloaded on : http://dast.nlanr.net/Projects/Iperf/ and is free and there are available on all the range of exe file for every plattform base of operating system.
2.- Locate the two data ports to test and marked one as "Server" while the other as "Client".
3.- After downloaded the executable file, proceed to unzip and placed it on some carpet.
4.- At the Server side you should type next command to enable the listen task:
> Ipers -s
5.- Adding the next flags you can configure at the Server and Client sides :
-w (size of TCP windows)
-t (the frecuency to throw the results on screen)
-f (using results based on : KBits, MBits, KBytes, MBytes)
6.- Then at the Client side you can adjust the command like than :
> Iperf -c 10.10.25.24 -t 1 -f KBytes -w 300K
"Testing from Client pc to 10.10.25.24 with updates of row information every 1 second, using the format KBytes with 300K of buffer socket size. "
Part Involved : Measure of bandwidth
Summary: Into my LAN connections, I want to measure the bandwidth between two data ports of my LAN.
Scenario : Troubleshooting and detect what type of applications executed into pc spends more networking resources.
Company : The National Cancer Institute of Peru (INEN).
Reference Date : January 2008.
After several tries of testing then I recomend you this excelent tool to follow and measure your bandwidth between two LAN locations designated by you.
1.- The executable file can be downloaded on : http://dast.nlanr.net/Projects/Iperf/ and is free and there are available on all the range of exe file for every plattform base of operating system.
2.- Locate the two data ports to test and marked one as "Server" while the other as "Client".
3.- After downloaded the executable file, proceed to unzip and placed it on some carpet.
4.- At the Server side you should type next command to enable the listen task:
> Ipers -s
5.- Adding the next flags you can configure at the Server and Client sides :
-w (size of TCP windows)
-t (the frecuency to throw the results on screen)
-f (using results based on : KBits, MBits, KBytes, MBytes)
6.- Then at the Client side you can adjust the command like than :
> Iperf -c 10.10.25.24 -t 1 -f KBytes -w 300K
"Testing from Client pc to 10.10.25.24 with updates of row information every 1 second, using the format KBytes with 300K of buffer socket size. "
lunes, 3 de diciembre de 2007
Video & Audio Streaming Concepts
Product : Linux.
Part involved : Streaming Server facilities.
Summary : Clears the way how this technology works.
Scenario : It is part of a free training program taught by COS-PERU.
Company : Open Source Center of Peru (COS-PERU).
Reference date : December 2007.
There are several services such as : radio and tv looking the way to change the broadcast of its signal information and opens the way to access them from internet selecting web browser since your computer. That is integration of Radio&Tv using ip technology.
Radio & TV have use the same requirements to build it and these ones are :
1.- Spread Server
2.- Broadcast Client (Life)
3.- Bandwidth assigned
The techniques used to transmit audio and data (video) is named "streaming". Then the Spread Server (1) managements and emits the streaming signal to www. About the quantity of simultaneous connections supported is called "concurrence" and can be calculated by how do you spend the concurrence resource of Spread Server. Then, next, we find a few samples of needs required for every type of broadcast.
Audio 24Kbps for every user connected
Video 100Kbps for every user connected
Buffer of the Spread Server.- Initially this parameter is considered to program and save space to concurrence concept, check next example :
- If my computer (1.-) has 1G RAM conifigured with 8K Buffer RAM, how many users can be attended ?
Remember that 1G= 1024K, then 1024/8= 128 users or concurrence top value.
The widthband (3.-) used by these concurrence connections then is calculated such as follow for :
Audio = 24 x 128 users = 3,072Kbps
Video = 100x 128 users = 12,800 Kbps
At this point, It's clear how many bandwidth will be used or How can I adjust this resource according to the available of bandwidth of my provider (ISP).
Related to the software used by Spread Server (1.-), we find next software free application to fullfill with this purpose : ShoutCast, IceCast, StreamCast, while these applications assigned carpets into server to every audio and video files to share and save information.
The Broadcast Client (2.-) converts the analog signal into digital signal through video capturer card (video broadcast case) while the client computer (user placed in office or home connected through www) needs to support multimedia basically since the applications WinAmp, Real Player, Windows Media to connect to (2.-).
There is a video example attached to show (2.-) under main title "YouTube Videos hosted by German Medina" at the right bottom of this page and select title "Video Streaming Concepts" for more information.
Part involved : Streaming Server facilities.
Summary : Clears the way how this technology works.
Scenario : It is part of a free training program taught by COS-PERU.
Company : Open Source Center of Peru (COS-PERU).
Reference date : December 2007.
There are several services such as : radio and tv looking the way to change the broadcast of its signal information and opens the way to access them from internet selecting web browser since your computer. That is integration of Radio&Tv using ip technology.
Radio & TV have use the same requirements to build it and these ones are :
1.- Spread Server
2.- Broadcast Client (Life)
3.- Bandwidth assigned
The techniques used to transmit audio and data (video) is named "streaming". Then the Spread Server (1) managements and emits the streaming signal to www. About the quantity of simultaneous connections supported is called "concurrence" and can be calculated by how do you spend the concurrence resource of Spread Server. Then, next, we find a few samples of needs required for every type of broadcast.
Audio 24Kbps for every user connected
Video 100Kbps for every user connected
Buffer of the Spread Server.- Initially this parameter is considered to program and save space to concurrence concept, check next example :
- If my computer (1.-) has 1G RAM conifigured with 8K Buffer RAM, how many users can be attended ?
Remember that 1G= 1024K, then 1024/8= 128 users or concurrence top value.
The widthband (3.-) used by these concurrence connections then is calculated such as follow for :
Audio = 24 x 128 users = 3,072Kbps
Video = 100x 128 users = 12,800 Kbps
At this point, It's clear how many bandwidth will be used or How can I adjust this resource according to the available of bandwidth of my provider (ISP).
Related to the software used by Spread Server (1.-), we find next software free application to fullfill with this purpose : ShoutCast, IceCast, StreamCast, while these applications assigned carpets into server to every audio and video files to share and save information.
The Broadcast Client (2.-) converts the analog signal into digital signal through video capturer card (video broadcast case) while the client computer (user placed in office or home connected through www) needs to support multimedia basically since the applications WinAmp, Real Player, Windows Media to connect to (2.-).
There is a video example attached to show (2.-) under main title "YouTube Videos hosted by German Medina" at the right bottom of this page and select title "Video Streaming Concepts" for more information.
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