Network technologies and trends:

Cisco 3560


September 24, 2008  8:27 AM

How to configure intervlan routing between Cisco Catalyst Switches and HP Procurve Switches Series 2



Posted by: Yasir Irfan
Cisco, Cisco 3560, Cisco 3560-E, Cisco Learning, Cisco Tips, HP Procurve, HP switches, Intervlan routing, IOS commands, IP Address, Networking, Switches

In my previous post

September 8, 2008  8:12 AM

How to reset/delete the password & configuraton on a Cisco WS-C350-48-SMI



Posted by: Yasir Irfan
Cisco, Cisco 2950, Cisco 3560, Cisco 3560-E, Cisco 3750-E, Cisco Tips, HyperTerminal, IOS commands, Password reset, Switches

This article...


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 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 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 5, 2008  6:52 AM

Show Commands in Cisco Routers and Layer 3 Switches(Most commonly used)Series -2



Posted by: Yasir Irfan
Cisco, Cisco 3560, Cisco Tips, IOS commands, Networking, Router Troubleshooting, Routers, Show commands, Switches

In my previous post I tried to cover some of the show commands which are...


August 2, 2008  6:43 AM

Show Commands in Cisco Routers and Layer 3 Switches(Most commonly used)Series -1



Posted by: Yasir Irfan
ASA/PIX, Cisco, Cisco 2950, Cisco 3560, Cisco 3560-E, Cisco 3745, Cisco 3750-E, Cisco 525, Cisco 6500, Cisco Tips, IOS commands, PIX 525, Router Troubleshooting, Routers, Show commands, Switches

Some of the widely used commands in Cisco routers are just simple unavoidable, among the most commonly used commands in a Cisco Routers are “show” commands. These commands are essential to Network Administrators. Here is a list of those commands. I...


July 20, 2008  8:53 AM

How to configure multiple interfaces in Cisco Switches



Posted by: Yasir Irfan
Cisco, Cisco 2950, Cisco 3560, Cisco 3560-E, Cisco 3750-E, Cisco 525, Cisco Tips, Networking, Switches

Configuring individual interfaces with same parameter on a Cisco Switch can be time consuming. In order to overcome this you can use following commands, from the global mode enter config t ITKE#configure t ITKE(config)# then issue interface range fastEthernet 0/1 -24 ITKE(config)#interface...


July 17, 2008  9:45 PM

How to display the configuration of a single interface in Cisco Router or a Switch



Posted by: Yasir Irfan
Cisco, Cisco 2950, Cisco 3560, Cisco 3560-E, Cisco 3745, Cisco 3750-E, Cisco 6500, Cisco Learning, Cisco Tips, Networking, Routers, Switches

Displaying configuration of a single interface can be a time-consuming task if your router or a switch  has extremely long configuration. In this case, the interface keyword of the show running-config command becomes extremely useful. For example, the show running-config interface serial 0/1 ...


July 15, 2008  6:36 AM

How to Secure SNMP in Cisco Switches and Routers



Posted by: Yasir Irfan
Access List, Cisco, Cisco 2950, Cisco 3560, Cisco 3560-E, Cisco 3745, Cisco 3750-E, Cisco 6500, Cisco Learning, Cisco Tips, Networking, Routers, SNMP, Switches

This article focus on the ways how we can secure SNMP access in Cisco Switches and Routers Simple Network Management Protocol (SNMP)   uses the default UDP port 161 for general SNMP messages and UDP port 162 for SNMP trap...


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