Network technologies and trends


January 23, 2010  12:47 PM

How to abort a Ping sequence in a Cisco Device?

Yasir Irfan Yasir Irfan Profile: Yasir Irfan

Imagine you are trying to ping a device from your Cisco Switch or a Cisco Router, but by mistake you type a wrong IP address, instead of waiting for the device to give a request time out you can about the ping sequence in your Cisco Device by pressing <CTRL-SHIFT-6> twice in succession. The Cisco Switch or a Cisco Router mentions there is an escape sequence, but doesn’t tell you what it is!

From above picture notice that the ping sequence stopped at 3rd packet.  -5 packets is the default. This combination works for trace route as well pings, both extended and regular.

 

January 23, 2010  5:14 AM

Journey to Unified Computing -is back on 4th of Feb 2010

Yasir Irfan Yasir Irfan Profile: Yasir Irfan

 

Are you interested on the benefits ofunified computing in your data center, and then good news is here. Cisco TechWise TV team is coming back with a new broadcast on 4th February 2010.

For sure it will be a great opportunity to learn how this new architectural approach will dramatically reduce your server, cabling, cooling, provisioning, and management needs. And learn how you can take a building block approach to a unified data center, while enjoying significant ROI at each step. This event comes to you with the participation of Intel, VMware and BMC.

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So book your calendar, register here  and have fun on February 4th at 1:00 pm EST

Agenda

·         Mapping the Journey

·         Intel and Cisco: Joined at the Chip

·         Cisco and the C-Series Servers

·         VMware and Virtualization-Aware Networking

·         BMC and Unified Computing


January 20, 2010  7:29 AM

Disable Cisco Discovery Protocol on unused interfaces

Yasir Irfan Yasir Irfan Profile: Yasir Irfan

We all know how important a Cisco Discovery Protocol (CDP) to troubleshoot the network, but sometimes this may leads to a problem. These days lot of free CDP discovery utilities is available. Anyone can download the CDP utility and start gathering info about your network. It’s always recommended to disable the Cisco Discovery Protocol (CDP) on all the interfaces in your Cisco devices. The only interfaces need to use the Cisco Discovery Protocol (CDP) are the ones which are connected to your Cisco Routers and Cisco Switches. Cisco Discovery Protocol (CDP) can be disabled by using “no cdp enable” command in the entire interface you need.

In my access Switch the CDP is enabled in all interfaces, you can determine this by using a command “show cdp interfaces” you can see CDP is enabled in  all the interfaces.

ITKE-AS01#sho cdp interfaces

FastEthernet0/1 is down, line protocol is down

  Encapsulation ARPA

  Sending CDP packets every 60 seconds

  Holdtime is 180 seconds

FastEthernet0/2 is down, line protocol is down

  Encapsulation ARPA

  Sending CDP packets every 60 seconds

  Holdtime is 180 seconds

FastEthernet0/3 is up, line protocol is up

  Encapsulation ARPA

  Sending CDP packets every 60 seconds

  Holdtime is 180 seconds

FastEthernet0/4 is down, line protocol is down

  Encapsulation ARPA

  Sending CDP packets every 60 seconds

  Holdtime is 180 seconds

 

 

FastEthernet0/12 is down, line protocol is down

FastEthernet0/24 is up, line protocol is up

  Encapsulation ARPA

  Sending CDP packets every 60 seconds

  Holdtime is 180 seconds

ITKE-AS01#

 

 

Let’s see to which interface the router is connected

ITKE-AS01#show cdp neighbors

Capability Codes: R – Router, T – Trans Bridge, B – Source Route Bridge

                  S – Switch, H – Host, I – IGMP, r – Repeater, P – Phone,

                  D – Remote, C – CVTA, M – Two-port Mac Relay

 

Device ID        Local Intrfce     Holdtme    Capability  Platform  Port ID

MOHMPLS          Fas0/24          176            R       2620XM    Fas 0/0

ITKE-AS01#

 

Let’s disable the CDP in all the interfaces expect fast Ethernet 0/24

 

ITKE-AS01#configure t

ITKE-AS01(config)#interface range fastEthernet 0/1 -23

ITKE-AS01 (config-if-range)#no cdp enable

 

In the above example I have disabled CDP in all interfaces except the one connected to the router.

 


January 20, 2010  5:56 AM

“Imagine virtually anything” is possible.

Yasir Irfan Yasir Irfan Profile: Yasir Irfan

 Cisco, NetApp and VMware have joined hand to present an elegant solution that may help you to imagine and achieve virtually anything, sounds great right. Then just register to the event and enjoy the executive discussions with Tony Bates, Cisco; Tom Georgens, NetApp; Paul Maritz, VMware; and a special guest and participate in a live Q&A with technical experts from all three companies.

 

The event is scheduled on 26th of Jan 2010 and timings are as follows

9:00–10:00 a.m. Pacific
12:00–1:00 p.m. Eastern

 

 


January 18, 2010  6:01 AM

Cisco AP 500 Series Wireless Access Points good for Small Business

Yasir Irfan Yasir Irfan Profile: Yasir Irfan

Cisco Systems launched recently a Wireless access point targeting the Small to Midsize business. The Cisco AP 500 Access Point is easy to install and manage.  The clustering technology with simplifies the deployment and of Cisco AP 500 AP by creating single point of administration for multiple Cisco AP 500 Access Points. Currently Cisco is offering one model AP 541.

 

The Cisco AP 500 comes with clustering technology, Gigabit Ethernet LAN interface for higher throughput, 802.11n compliance and dual band user selection for either 2.4 GHz or 5 GHz and more over it supports voice roaming.

 

Some of the features of Cisco AP 500 are as follows

Cisco AP 500 Series Wireless Access Points offer a range of features:

  • Clustering Technology: Simplifies wireless deployments by creating a single point of administration for multiple access points. Clustering technology replicates a configuration, pushes it out to other access points, and continuously manages the frequency channels for each device, reducing network interface.
  • Superior Performance: Gigabit Ethernet LAN interface for higher throughput. Wireless radio complies with 802.11n wireless technology, using MIMO technology to enhance network coverage, capacity, and throughput for data and multimedia applications, while allowing for backward compatibility with a, b, and g clients.
  • Robust Security: Supports business-class security encryptions (WPA2, 802.1x supplicant) and authentication for client compatibility, MAC address authentication, client isolation, and rogue access point detection.
  • Voice Roaming: Allowing for client fast roaming while maintaining good voice quality with 802.11i pre-authenticated standards.
  • Power Options: Uses both standard AC power and Power-over-Ethernet (PoE), simplifying installations in locations such as drop ceilings where power outlets may not be accessible.

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January 17, 2010  6:14 AM

SolarWinds is offering Free Networking Tools

Yasir Irfan Yasir Irfan Profile: Yasir Irfan

SolarWinds a leading Network Management Software company is offering Free Networking tools, especially the SolarWinds TFTP server is an award winning application. After acquiring Kiwi Syslog, SolarWinds improved its features. Just download the free Networking tools and relax.

Real-Time NetFlow Analyzer

This free desktop tool captures and analyzes NetFlow data so that you can:
• Quickly answer “why’s the network so slow?”
• Identify network top talkers
• Analyze traffic spikes and bandwidth consumption

VM Monitor

Get X-Ray Insight into Your ESX Servers
• Quickly check the health of your VMware ESX Server
• View detailed virtual machine health statistics
• Get visual alerts when performance degradation occurs

Exchange Monitor

Continuously monitor Microsoft® Exchange health, including:
• Exchange services
• Mail queues
• Host server health

Award-Winning TFTP Server

The most robust, widely trusted and easy-to-use TFTP server which enables you to:
• Concurrently upload and download images from multiple devices
• Upload and download configurations to devices
• Transfer files larger than 32MB

Kiwi Syslog Server

A powerful, flexible Syslog Server that’s easy to use:
• Receive and Manage Syslog messages from devices
• Log and Forward Syslog messages based on priority or time of day
• View Syslog messages in multiple windows simultaneously


January 16, 2010  5:44 AM

How to send message to one telnet users from a Cisco Router or Cisco Switch?

Yasir Irfan Yasir Irfan Profile: Yasir Irfan

In my last article we know how to send a message to all telnet users in a Cisco Router or a Cisco Switch using “send” command. This command can also use to send a message any particular telnet users. It’s quite simple.

Long in to your Cisco Device and look for current telnet users, by using a “show users” command

 

ITKESW01#sho users

    Line       User       Host(s)              Idle       Location

   1 vty 0     netmgr     idle                 00:00:49 10.0.0.5

   2 vty 1     yasir      idle                 00:00:16 10.0.0.5

*  3 vty 2     yasir      idle                 00:00:00 10.0.0.7

 

  Interface      User        Mode                     Idle     Peer Address

 

ITKESW01#

 

 

If you want to send a message to vty session 1 then do as follows.

 

ITKESW01#send 1

Enter message, end with CTRL/Z; abort with CTRL/C:

Dear User netmgr please log off as we need to change your password

^Z

Send message? [confirm]^Z

ITKESW01#

 

 

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January 12, 2010  5:08 AM

An introduction to some of new features in ASP.Net 4.0 and Visual Studio 2010

Yasir Irfan Yasir Irfan Profile: Yasir Irfan

Recently a good friend of mine published an article which highlights on the some of the new features in ASP.Net 4.0 and Visual Studio 2010.

http://www.codeproject.com/KB/aspnet/Whatis_New_ASP_Net_4.aspx

This article is worth reading, though I am not into ASP.Net or Visual Studio, I enjoyed the article.

The author of this article can be reached at abdul_sami_20@hotmail.com


January 9, 2010  10:21 AM

How to send a message to all telnet users from a Cisco Router or Cisco Switch?

Yasir Irfan Yasir Irfan Profile: Yasir Irfan

 

 

Imagine you need to  restart your Cisco Router or a Cisco Switch for some reason, but there are few telnet users logged into your Cisco device. There is a way to send a message to all active telnet users. By using a “send” command from your Cisco Router or a Cisco Switch you can send a message. To do so login to your Cisco Router or a Cisco Switch and type “send*”

 

ITKEAS01# send *

 

Once you enter “send*” in your Cisco Router or a Cisco Switch you will see the following prompt in your device

 

 

Enter message, end with CTRL/Z; abort with CTRL/C:

 

Then you can type your message followed by control Z to send the message to all tty lines.

 

 

This is test message

Please log out of router as we need to restart it^Z

Send message? [Confirm]

ITKEAS01# #

 

 

***

***

*** Message from tty1 to all terminals:

***

This is test message

Please log out of router as we need to restart it

 

 

ITKEAS01#

 

NOTE: When you want to send the message use the CTRL/Z key sequence

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January 5, 2010  7:02 AM

PM crash course for IT Professionals helped me to execute our Data Center Expansion Project

Yasir Irfan Yasir Irfan Profile: Yasir Irfan

First of all I would like to thanks Michael Morisy from ITKE for offering me a copy of “PM crash course for IT Professionals” also I am thankful to Jamie Adams from Cisco Press for her support all the time.

 

Since I was the Project Manager for our Data Center Expansion project, this book came to me as a great working manual to implement the project. I followed the methodology discussed by the author a management guru Rita Mulcahy (PMP) and I imbibed the methodology into my project which led to successful completion.

 

 

The book really met the objectives to assist the IT professionals to sharpen their project management skills. The best thing I like about the book is the way Rita explained the essentials of project management and this book can be read in a short span of time.

 

The “PM crash course for IT Professionals” is a fine book in which the author have refined the essentials of Project Management into concise points. The exercises, check lists, templates available in this book are quite beneficial especially to IT Professionals. 

 

I would recommend the “PM crash course for IT Professionals” for IT professionals/ Project Manages who are looking an immediate impact on going projects as this book comes with lots of easy to use tools and processes followed by great ideas .


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