Network technologies and trends:

Cisco 6500


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 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 30, 2008  12:59 PM

Network Inventory and Configuration Management



Posted by: Yasir Irfan
Cisco, Cisco 2950, Cisco 3745, Cisco 6500, Cisco Tips, Configuration Management, Network Inventory, Networking, Open Source, Routers, SNMP, Switches, ZipTie

We all know much about Kiwi Syslog Software.  For many years I am using Kiwi Cat tools for configuration management and automate many of daily tasks. Kiwi Cat tool really helped me to perform many tasks like configuration backup, telnet, SSH and much more....


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...


July 6, 2008  6:25 AM

How to restrict the web access to Cisco Switches & Routers.



Posted by: Yasir Irfan
access-lists, Cisco, Cisco 3560, Cisco 3745, Cisco 6500, Routers, Switches

 Here in this example I am going to show you how to restrict the web access to any Cisco IOS Switch or Router. If web-based administration of the switch is necessary, then restrict HTTP access to the switch. Configure a standard access-list (e.g., 11) that allows only the administrators’...


July 1, 2008  11:20 AM

Cisco Cool tips- Series 4 -Show modules



Posted by: Yasir Irfan
Cisco, Cisco 6500, Cisco Tips, Networking, Switches

Here is one more cool command which shows a summary of modules installed in a Cisco 6500 Switch. MBGF-DAC-6500-BB02#sho modules Mod Ports Card Type Model Serial No. --- ----- -------------------------------------- ------------------...


June 23, 2008  8:27 AM

Cisco Cools tips – Series 2,Using Privilege Mode Commands in Global Configuration Mode



Posted by: Yasir Irfan
Cisco, Cisco 6500, Cisco Tips, Networking, Routers, Switches

Begining with IOS version 12.3, Cisco has finally added a command to the IOS that allows you to view the configuration and statistics from within configuration mode. Here’s a handy tip when using the show, ping, and telnet commands. Instead of switching back and forth between global...


June 17, 2008  7:02 AM

Configuring HSRP in Cisco 6500 Switch



Posted by: Yasir Irfan
Cisco 6500, HSRP, Networking, Switches

Configuring HSRP in a Cisco 6500 Switch Yasir Personel Website:www.yasirirfan.com


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