Network technologies and trends:

August, 2008


August 30, 2008  5:16 AM

A cool tool to solve layer 1 UTP cable issues in Cisco Catalyst Switches.

Yasir Irfan Yasir Irfan Profile: Yasir Irfan

Here is a simple and cool tool for solving layer 1 UTP cable issues in a Cisco Catalyst Switches, the command used for this function is "test cable-diagnostics tdr interface" Here is the example MBGF-DAC-3560-AS01#test cable-diagnostics tdr interface gigabitEthernet 0/1 TDR test started on...

August 24, 2008  6:20 AM

How to reset the Cisco Catalyst Switch to Factory Defaults

Yasir Irfan Yasir Irfan Profile: Yasir Irfan

To reset the Cisco Catalyst switches to factory defaults, you need access to the Cisco Catalyst Switch console through either a physical console or a Telnet connection. You also need the console/enable passwords. If you forget the console and...


August 23, 2008  6:04 AM

Discover Cisco Network Assistant (CNA)

Yasir Irfan Yasir Irfan Profile: Yasir Irfan

Cisco Network Assistant (CNA) is a PC-based graphical network management application which is free tool included when a new Cisco Switch is...


August 20, 2008  6:22 AM

What is Service timestamps logging, and how it can be configured Cisco Switch or a Router?

Yasir Irfan Yasir Irfan Profile: Yasir Irfan

Logging is a quite essential part of a secure network configuration. Logging not only helps the Network Administrators to identify the issue while troubleshooting, also enables them to react to intrusion attempts or Denial-of –Service attacks....


August 17, 2008  5:55 AM

What is the Link-flap error in Cisco Switches?

Yasir Irfan Yasir Irfan Profile: Yasir Irfan

Link flap means that the interface continually goes up and down in a Cisco Switch. The interface is put into the errdisabled state if it flaps more than five times in 10 seconds. The common cause of link flap is a Layer 1 issue such as a bad cable,...


August 16, 2008  11:12 AM

How to change an IP address in a HP Procurve Switch

Yasir Irfan Yasir Irfan Profile: Yasir Irfan

Changing an IP address in a Cisco Switch is quite simple, where as in HP Procurve Switches if you try to change an IP address for any existing vlan you get an error message...


August 12, 2008  6:56 AM

Juniper Networks launches Network and Security Manager (NSM)

Yasir Irfan Yasir Irfan Profile: Yasir Irfan

Juniper Networks is expanding its network and security management capabilities across routing, switching and security infrastructure with the launch of the Network and Security Manager (NSM).

The...


August 11, 2008  1:37 PM

What happened to the telnet client in Windows Vista?

Yasir Irfan Yasir Irfan Profile: Yasir Irfan

As we all know how important is a...


August 9, 2008  6:35 AM

Cisco’s Come Back Program

Yasir Irfan Yasir Irfan Profile: Yasir Irfan

Now there is a good news for networking professionals who are aspiring for Cisco Certifications.  You can retake the exams for free under Cisco “Come Back” program. Cisco and Pearson VUE have partnered to give networking professionals the opportunity to re-invest in...


August 5, 2008  7:20 AM

Microsoft touchscreen technology (Microsoft Surface Sphere)

Yasir Irfan Yasir Irfan Profile: Yasir Irfan

Microsoft is continuing its Research to come out with some interesting touch screen devices, first it was a coffee table, then the wall and now they are coming up with the Sphere. According to


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