Network technologies and trends:

Network Troubleshooting


October 6, 2008  7:34 AM

Things to be considered before upgrading an IOS in a Cisco 6500 Series Switch with SUP720- Series 3



Posted by: Yasir Irfan
Cico 6500 IOS Upgarde, Cisco 6500, Cisco 6500 Power Supply, Cisco IOS, Cisco Tips, IOS commands, IOS Upgrade, Network Troubleshooting, Networking, Redundency, Redundent Power Supply, Switches

In the second series I  was...

September 29, 2008  12:26 AM

Things to be considered before upgrading an IOS in a Cisco 6500 Series Switch with SUP720- Series 1



Posted by: Yasir Irfan
3Com TFTP, Cisco, Cisco 6500, Cisco IOS, Cisco Learning, Cisco Tips, DataCenter, IOS Upgrade, Network Troubleshooting, Networking, PacketTrap pt360, PacketTrap TFTP, SolarWinds, Switches, TFTP Server

Today I successfully upgraded the IOS for a Cisco Catalyst 6513 Switch with Supervisor Engine SUP720. Couple of years I faced some problems while I was upgrading the IOS for


August 30, 2008  5:16 AM

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



Posted by: Yasir Irfan
Cisco, Cisco 3560, Cisco 3560-E, Cisco 3750-E, Cisco Learning, Cisco Tips, IOS commands, Layer 1 issues, Network Troubleshooting, Switches

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



Posted by: Yasir Irfan
Cisco 2950, Cisco 6500, Cisco Learning, Cisco Tips, Network Troubleshooting, Networking, Switches

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)



Posted by: Yasir Irfan
Cisco, Cisco 2950, Cisco 3560, Cisco 3560-E, Cisco 3750-E, Cisco Network Assistant, Cisco Tips, Network Inventory, Network Troubleshooting, Networking, Routers, SNMP, Switches

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


July 22, 2008  9:02 AM

Network Diagrams get rated here!



Posted by: Yasir Irfan
Network Diagrams, Network Layouts, Network Troubleshooting, Networking

Dear friends , I was preparing Network Diagram for our ourganisation,  but our I.T Director was never happy with the outcome. I was just following the standards to prepare the network diagram.  In order to convince the Director I just mailed him the link which has some really amazing...


July 12, 2008  8:06 AM

Good Documentation is must for Network troubleshooting



Posted by: Yasir Irfan
Cisco, Fiber, Network Documentation, Network Troubleshooting, Networking, Redundency, Routers, SFP, Switches

Dear Friends

Today after a good weekend when I came back to my office, I figured out two our switches has problems with the redundant links. It would have consumed more time if I had no proper...


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