Network technologies and trends:

Networking


September 6, 2008  10:40 AM

The best way to record the serial number for Cisco Devices for Remote support.



Posted by: Yasir Irfan
Cisco, Cisco 2950, Cisco 3745, Cisco 6500, Cisco Tips, IOS commands, Switches, Telnet

Imagine if you are accesing the remote router and need to figure out the serial number for a router or the Circuit IDs of the serial interface, then you may start looking your docmented data or call the remote technician to help you out in figuring these details. The best and easy way to get...

September 1, 2008  9:42 AM

Most Commonly used Network Layer Utilities



Posted by: Yasir Irfan
ARP, CCNA, Certifications, Cisco, Cisco Learning, Cisco Tips, DHCP, DNS, Network Layer Utilities, Networking, OSI Layer 3, Ping

I was just thinking about the most commonly used Network Layer utilities in day to day business. Here are they which are useful to guys who are aspiring for their CCNA. 1) Address Resolution Protocol (ARP) 2) Domain Name Systems (DNS) 3) Dynamic Host Configuration Protocol (DHCP) 4)...


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...


August 20, 2008  6:22 AM

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



Posted by: Yasir Irfan
Cisco, Cisco 2950, Cisco 3745, Cisco 6500, IOS commands, Router Troubleshooting, Service timestamp, Switches, Syslog

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?



Posted by: Yasir Irfan
Cisco, Cisco 2950, Cisco 3560, Cisco 3560-E, Cisco 3750-E, Cisco 6500, Err-disable, Layer 1 issues, Link-Flap, Switches

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



Posted by: Yasir Irfan
HP Procurve, HP switches, IP Address, Switches

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)



Posted by: Yasir Irfan
Juniper, Network and Security Manager, Network Security, NSM, Routers, Security, Switches

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?



Posted by: Yasir Irfan
Networking, Telnet, Windows Vista

As we all know how important is a...


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