Network technologies and trends

April 20, 2010  8:30 AM

Make sure to clear ARP

Posted by: Yasir Irfan
ARP, Cisco Firewall, Cisco PIX firewall, Cisco Tips, clear arp, clear arp-cache, NAT tips, Network troubleshooting tips, router tips, Switch Tips


Most of the times I have noticed, whenever someone configures a NAT in a Cisco PIX firewall 525 or a Cisco ASA firewall, he says my NATing is not working.  This is true especially if you are configuring a NAT for a real IP (which is in use) to private IP. The moment NAT is configured in a firewall he assigns the private IP to his machine and check whether the NAT is working?  Usually it fails to work. The reason behind is the arp cache is not cleared in the firewall, switch and the router.

Next time whenever you configure a NAT for a used real IP make sure you clear the arp by “clear arp-cache” in your Cisco router and Cisco Switch. “Clear arp” in your Cisco firewall . To do so simply use the below command from the privilege mode in your Cisco device

ITKE-ROUTER#clear arp-cache

ITKE-SWITCH#clear arp-cache


April 18, 2010  5:11 AM

Cisco 6900 Series IP Phones – Making communication affordable

Posted by: Yasir Irfan
Cisco, Cisco 6900, Cisco 6921, Cisco 6941, Cisco 6961, Cisco 7900, Cisco IP Phones, Cisco Press Release, Cisco Systems, Cisco Unified Communication, codecs, full-duplex, IP Telephony network, Network Technologies and Trends, Network Trends, XML Applications

We all know about the Cisco 7900 series IP Phones, there are many organizations who cannot afford those phone in their IP Telephony network. I myself know few organizations that are using Cisco UC for their IP telephony but when it comes to IP phones they are opting for alternatives cheaper phones. Now no worries Cisco have an answer.

A recent Cisco’s press release points out coming June 1 2010, three models of the Cisco 6900 series IP Phones are designed for “budget-constrained deployments” Cisco has a couple of other lower-specked series — the 500 and 3900 series — which are aimed at small business and low-usage scenarios.

The 6900 series comes in three models: the 6921, 6941 and 6961, which support two, four and 12 lines respectively. Colors available are white and black, and the devices can be ordered in two different handset styles.

The Cisco 6900 Series is full-duplex speakerphone with LAN and PC Ethernet connections, and supports several dozen languages, an optional headset, some XML applications on the LCD screen, different ringtones, and multiple codecs and so on.

Full specifications for the Cisco 6900 Series phones are available from Cisco’s website.

April 13, 2010  5:35 AM

Borderless Networks the future of Networks

Posted by: Yasir Irfan
borderless Networks, borderless networks at a glance, Cisco News, Cisco Press, Cisco Press Books, Cisco’s innovations, collaborative applications, mobility, Network technologies & trends, Virtualization, Web2.0, “Securing the Borderless Network: Security for the Web 2.0 World”

These days’ people are talking about the borderless networks; some of the presentations in the recently concluded Cisco Networkers in Bahrain were exclusively about the borderless Networks. As we all know Cisco Borderless Networks deliver intelligent, adaptive services to streamline your operations and increase flexibility, resiliency, and security.

I was wondering how I can attain more knowledge about Borderless Networks, Cisco Press has answers. They just launched the title Securing the Borderless Network: Security for the Web 2.0 World” by Tom Gills.

This title deals with Securing the Borderless Network reveals new techniques for securing advanced Web 2.0, virtualization, mobility, and collaborative applications

Discover how Cisco’s innovations in switching, routing, security, and mobility can get you started today.

Learn more about borderless networks: 

·         Borderless Networks At-A-Glance

·         Eliminating Borders to Enable Any Place, Any Time, Any Device Access White Paper

·         Cisco TrustSec At-A-Glance

March 31, 2010  1:56 PM

Cloud Services and SaaS: A Smarter Way to do Business

Posted by: Yasir Irfan
Cisco News, Cisco survey, Cisco Systems, Cisco Updates, Cloud Services and SaaS


According to a recent Cisco survey, only 20 percent of small businesses know what “cloud services” are, even though 75 percent of SMBs polled are already using some kind of hosted or subscription-based service to enhance their business goals. Read rest of the story by following this link.

March 31, 2010  12:51 PM

Cisco among 2010 World’s Most Ethical Companies

Posted by: Yasir Irfan
Cisco News, Cisco Systems, Ethisphere, Network News and trends, World’s Most Ethical Companies


Cisco Systems has been named one of the World’s Most Ethical Companies in 2010 by Ethisphere Institute. The World’s Most Ethical Company designation is awarded to those companies that have leading ethics and compliance programs, particularly as compared to their industry peers. Interested to know who all is in this list access link.

March 31, 2010  4:21 AM

Passed ITIL v3 Foundation exam

Posted by: Yasir Irfan
Bangalore, ITIL v 3 Bangalore, ITIL v3 Foundation training, ITILv3 Certification, ITILv3 foundation, ITILv3 Pune, Pune, Vyom Labs


Yesterday I passed ITILv3 Foundation exam, these days I am on my vacation in Bangalore. Since arrived I was thinking of ITILv3. I started contacting ITILv3 training centers and figured out VYOM labs is the best training center in this part of the World. Initially the training dates in Bangalore were conflicting with my brother’s wedding date, so I started looking other leaders in ITIL training in Bangalore.


Somehow things didn’t work well for me in Bangalore for training; again I approached VYOM labs for any training schedule in and around Bangalore on 26 & 27th of March. Pune was the only destination where ITIL v3 foundation training was conducted. I decided to attend the Pune ITIL v3 training offered by VYOM labs. It was worth attending the training. The instructor Ms. Beena Dhage an ITIL expert conducted the training in excellent way. I would strongly recommend to attend her training sessions if you are planning for ITIL v3 foundation. Two days of rigorous fun filled training and little practice can help you achieve IITL v3 foundation. I did also enjoy the company of my fellow trainees who were very supportive and most of them too pass their ITILv3 exam at first attempt. Congrats to them.

I hope to start next step in ITIL by preparing for life cycle modules “ Service Strategy or Service Transition” may be this time I will go for an online training with VYOM labs as they are offering both foundation and Intermediate trainings.

You can contact VYOM labs for more information on training

March 26, 2010  8:53 AM

Cisco 100 Series unmaged Swicthes

Posted by: Yasir Irfan
Cisco 100 Series Switches, Cisco Switches, Cisco Systems, Cisco Updates, LAN, Network, Switches, unmanaged Switches

Till yesterday when it comes to unmanaged Switches only 3Com comes to my mind, but now Cisco Systems launched unmanaged switches “Cisco 100 Series Unmanaged Switches”. The Cisco 100 Series Switches deliver powerful network performance and flexibility for small business networks, without the complexity. With no installation software and nothing to configure, you get an affordable, reliable network that just works, right out of the box.

The Cisco 100 Series Switches proves to be useful to very small organizations or home users to establish network connectivity, especially the games savvy users can enjoy the great features offered by Cisco 100 Series Switches with life time warranty, some of the features of Cisco 100 Series Switches are

  • Choice of Fast Ethernet and Gigabit Ethernet connectivity
  • Available in desktop or rack mount models
  • Sets up in minutes with no software to install or configuration requirements
  • Automatic cable detection, so you don’t have to worry about using the wrong cable type
  • Automatic speed and full- and half-duplex sensing helps ensure that you’re running at the right network speed
  • Auto quality of service (QoS) on all models prioritizes network traffic to keep critical network applications running at top performance
  • Fanless design so switches run silently and unobtrusively
  • Power-saving technology is able to enter sleep mode, turn off unused ports, and adjust power as needed
  • Flexible network design mini Gigabit interface converter (GBIC) expansion slots
  • Compatibility with network devices from other vendors
  • Ability to trade up to a Cisco or Cisco Small Business switch at any time and receive full credit for the value of their switch
  • Limited Lifetime Warranty to protect your investment

March 26, 2010  7:09 AM

Microsoft Launches Preview of Dynamics CRM5

Posted by: Yasir Irfan
Community Technology Preview, CRM5, CTP3, Dynamics CRM5, eweek, Microsoft, Microsoft news

On Thursday 25th of March 2010, Microsoft delivered the new Community Technology Preview (CTP) of the next generation of the company’s Microsoft Dynamics CRM software, codenamed CRM5.

Microsoft has delivered a new Community Technology preview (CTP) of the next generation of the company’s Microsoft Dynamics CRM software, codenamed quot;CRM5. quot; The March 25 release is the third CTP (CTP3) of the quot;CRM5 quot; technology and it is aimed at software developers.

Rest of the article can be viewed at the following link.

March 13, 2010  1:34 AM

VTY passwords for telnet can be disabled

Posted by: Yasir Irfan
Cisco Router tips, Cisco Routers, Cisco Switch tips, Cisco Switches, Cisco Tips, Network Technologies and Trends, no login, Telnet Tips, VTY


Here is a cool tip for saving your time when ever your telnet to your Cisco Switch or a router. By using no login command you can telnet directly to your Cisco device without any authentication, this proves to be good only in lab environment to save time but its hardly recommended not to use this feature in real networks.

To configure this feature follow the below configuration steps.


           ITKE01#configure terminal

           ITKE01 (config)#line vty 0 4

           ITKE01 (config-line)#no login





Notice that no authentication was required. You are taken directly to user mode.

March 12, 2010  3:56 AM

Cisco Unveils Next Gen Carrier Router

Posted by: Yasir Irfan
Cisco CSR-3, Cisco News, Cisco® CRS-3 Carrier Routing System, cloud computing, CRS, Data Center, Internet, Network Technologies and Trends, Video Call

On March 9th 2010, Cisco announced a major advancement in internet, the Cisco® CRS-3 Carrier Routing System (CRS)  an advanced platform designed to deliver new wave of video, mobile and data center and much talked cloud services.


According to Cisco Systems, the Cisco® CRS-3 Carrier Routing System (CRS) the entire population of the China can make a video call at once , the entire printed collection of the Library of Congress to be downloaded in just over one second; . Every single motion picture ever created can be streamed in less than four minutes.

Pic Courtesy:Cisco Systems

The Cisco® CRS-3 Carrier Routing System (CRS) – designed to serve as the foundation of the next-generation Internet and set the pace for the astonishing growth of video transmission, mobile devices and new online services through this decade and beyond.

With more than 12 times the traffic capacity of the nearest competing system, the Cisco CRS-3 is designed to transform the broadband communication and entertainment industry by accelerating the delivery of compelling new experiences for consumers, new revenue opportunities for service providers, and new ways to collaborate in the workplace.


  • The Cisco CRS-3 triples the capacity of its predecessor, the Cisco CRS-1 Carrier Routing System, with up to 322 Terabits per second, which enables the entire printed collection of the Library of Congress to be downloaded in just over one second; every man, woman and child in China to make a video call, simultaneously; and every motion picture ever created to be streamed in less than four minutes.
  • The Cisco CRS-3 enables unified service delivery of Internet and cloud services with service intelligence spanning service provider Internet Protocol Next-Generation Networks (IP NGNs) and data center.  The Cisco CRS-3 also provides unprecedented savings with investment protection for the nearly 5,000 Cisco CRS-1 deployed worldwide.  Cisco’s cumulative investment in the Cisco CRS family is $1.6 billion, further underscoring the company’s commitment.
  • AT&T, one of the world’s largest telecommunications companies, recently tested the Cisco CRS-3 in a successful completion of the world’s first field trial of 100-Gigabit backbone network technology, which took place in AT&T’s live network between New Orleans and Miami.  The trial advances AT&T’s development of the next generation of backbone network technology that will support the network requirements for the growing number of advanced services offered by AT&T to consumer and business customers, both fixed and mobile.
  • The Cisco CRS-3 is currently in field trials, and its pricing starts at $90,000 U.S.

Forgot Password

No problem! Submit your e-mail address below. We'll send you an e-mail containing your password.

Your password has been sent to: