Network technologies and trends

July 6, 2010  6:13 AM

Cisco’s Enhance POE worked for power more than 20 watts

Yasir Irfan Yasir Irfan Profile: Yasir Irfan

In one of my previous articles I was talking about the POE compatibility issues between Cisco Catalyst 3750 E Switches and Cisco Aironet 1250 Series Access Point, I was getting following error.

Jun 21 08:30:28.447: %CDP_PD-2-POWER_LOW: All radios disabled – NEGOTIATED WS-C3

750E-48PD (8843.e17f.f60d)

Jun 21 08:31:28.451: %CDP_PD-2-POWER_LOW: All radios disabled – NEGOTIATED WS-C3

750E-48PD (8843.e17f.f60d)

After some research I figured out Cisco 3750 E Switch is capable of enhance POE , which can provide POE power of 20 Watts compared to standard 15.4 Watts per port, I updated the IOS for one my Cisco Catalyst 3750 E Switch from 12.2(35)SE5 to 12.2(53)SE2

 Once the IOS update was done I used the following command on the particular port to provide 20 watts of power

ITKE-AS01(config-if)# power inline port max 20000

Then AP Started working normally and all the wireless radios were up and running as demonstrated below.

June 29, 2010  1:14 PM

Cisco TAC-Support never expected so fast!

Yasir Irfan Yasir Irfan Profile: Yasir Irfan


We are facing some problems with couple of Cisco IP Phones, lucky we had SMARTNET. I was out of my office; I was thinking how I can open a TAC case. I managed to get the toll free number for Cisco TAC center. I called them and placed my compliant. Within few moments I received the service request number and the support Engineer assigned to my case. In matter of five minutes I got the confirmation email from the Cisco support Engineer stating that our hardware will be replaced and he reconfirmed me back the shipping address. I never thought or expected a quick fast reply from Cisco support team. Hats off to Cisco as they value their customers and for Cisco, customer support seems to be the number one priority.

I strongly recommend all Cisco customers to have a SMARTNET for all their Cisco devices, to enjoy the privilege of getting support as soon as possible. You can always avoid the down time and can fix the problem at the earliest. If there are any hardware issues Cisco always try to ship the failed hardware at the earliest based on type of SMARTNET support you have.

June 28, 2010  6:18 AM

The countdown for Cisco Live started – Be there live or virtual

Yasir Irfan Yasir Irfan Profile: Yasir Irfan

As we all know the biggest event of the year for Cisco Systems has already started at Mandalay Bay Hotel in Las Vegas. Most of the Cisco Experts are already there enjoying the biggest Technical party. Just for your info Cisco Live 2010 comes in two flavors

 –Cisco Live , which will be in Mandalay Bay Hotel  in Las Vegas
Cisco Live  virtual, – June 29 to July 1st -which offers an opportunity to visit the Cisco booth, including the Data Center of the Future demo (see below) and attend on line numerous speaking sessions

Pic Courtesy: Cisco Systems

The theme of this year is “Knowledge is Power” , which perfectly reflects the main purpose of the show – Thousands of visitors will attend hundreds of informative sessions, delivered by Cisco trainers and partners designed to educate them on new concepts and new solutions . In addition, Labs and demos (World of Exhibitions) will give an opportunity to go deeper.

Tuesday  June 29th  
10:00-11:30am  John Chambers, Chairman and Chief Executive Officer, Cisco
11:45 -12:15 pm  Executive chat session with Carlos Dominguez Senior Vice-President, Office of the Chairman and CEO, Cisco
12:30-2:20 pm   Bridging in the Data Center, with or without Spanning Tree
2:45 -3:45 pm  Understanding of Application Performance and Network Usage in the Data Center – Ward Cobleigh, Business and Partnership Development Director, Fluke Networks
Wednesday June 30th
10:30-11:30 am  Padmasree Warrior, Chief Technology Officer, Cisco
11:45- 12:15 pm   Executive Chat Session with Padmasree
12:30 – 2:30 pm   Cisco Announcing New Innovations for Breakthrough Data Center 3.0 Architecture
2:45 -3:45 pm  Video: What Next? – Featuring Marthin De Beer, Senior Vice President, Emerging Technologies Group, Cisco
Thursday July 1st
10:30-11:30 am   Ben Mezrich,author  “The Accidental Billionaires: The Founding of Facebook: A Tale of Sex, Money, Genius and Betrayal;”
 12:30 -2:30 pm  Planning the Migration to Cisco Unified Computing System or
12:30 -2:00 pm  Data Center Customer Panel: Insights on Data Center, Computing, and Virtualization  

Since I am in other part of the Globe I will be attending Cisco Live virtual and I will try to keep you all updated on the sessions and activities. Don’t miss this opportunity as the theme of the event “Knowledge is Power” is more than enough to experience some new concepts and new solutions. You still have a chance to be part of this event virtually.

June 24, 2010  9:19 PM

New data centre standard published by BICSI

Yasir Irfan Yasir Irfan Profile: Yasir Irfan

BISCI announced its newest standard, BISCI 002-2010, Data Center Design and Implementation Best Practices. The new standard BSCI 002-2010 is intended to reflect the growing complexity of the Data Center deployments and the need for Companies to understand the electrical, mechanical and telecommunications requirements while designing new infrastrucre of Data Centers.

The new standard BISCI 002-2010 includes the best practice, requirements and consideration for the Data Centre design including factions such as site selection, thermal systems, layout and security, and also the new standard is compatible with existing data center standards.

Pic Courtesy:BISCI

Jonathan Jew, Co-chair of the Data Center Standards Subcommittee and lead editor of the standard said: “BICSI 002 is a great resource for data center designers and operators because it provides a wealth of information on the subjects important to this audience-all in one place. It is the culmination of the efforts of more than 150 subject matter experts in a wide variety of disciplines related to data center design.”

“This is truly a great achievement for BICSI and our membership as BICSI 002-2010, Data Center Design and Implementation Best Practices is the ultimate standard for anyone working in the data center arena,” said Brian Hansen, RCDD, NTS, CSI, and BICSI President. “I’d like to extend a thanks to all of the Data Center Subcommittee members for their hard work and dedication in producing what we believe to be the most comprehensive data center standard to date.”

BICSI 002 is available for purchase at BICSI members qualify for a reduced fee.

June 24, 2010  12:10 PM

Social Networking is coming to Enterprise Networks thanks to Cisco Quad

Yasir Irfan Yasir Irfan Profile: Yasir Irfan

We are leaving in the era of social networking, these days social networking sites like Facebook, LinkedIn and Twitter are becoming part of our work culture. No doubt we are all enjoying these new features of social networking to reach out the new height of business success.

Seems to be inspired by the success of social networking, Cisco Systems is coming out with a new social collaboration platform aimed at Enterprises called Cisco Quad. Cisco Systems designed the Cisco Quad to take popular social networking tools and trick and blend them into a single platform purely for business use which is due to be released for limited uses in the first quarter of Cisco’s financial year 2011. Cisco Quad initially will be available in the U.S., Canada, the United Kingdom, Australia and New Zealand.

It’s a social way of dealing with everyday business, according to Murali Sitaram, vice president and general manager of Cisco’s Enterprise Collaboration Platform.

“We’ve borrowed from the Web 2.0 world,” Sitaram said, noting that Cisco has been working on Quad for about three years. “It’s a manifestation of social capabilities.”

I am looking forward to test Cisco Quad, which looks to be a useful platform.

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June 22, 2010  5:53 AM

Cisco Enhanced PoE is the answer for delivering PoE in excess of 15.4W per port.

Yasir Irfan Yasir Irfan Profile: Yasir Irfan

In my previous post I was talking about the POE issues related to Cisco Aironet 1252 AP and the Cisco Catalyst 3570 E Switch, to resolve this Cisco Systems have an answer “Enhanced Power over Ethernet.


After posting my article I did a little search on and I found the following white paper

“Cisco Enhanced PoE



To support new and emerging technology, many of Cisco’s customers have an immediate requirement for PoE in excess of 15.4W per port. For example, Cisco has introduced a new wireless access point compliant with the IEEE 802.11n draft 2.0 standards. This wireless access point, the Cisco Aironet® 1250 Series Access Point, supports two radios, which use MIMO and other new technologies to increase the throughput, reliability, and predictability of the wireless network. However, to function at full capability, the Cisco Aironet 1250 requires 18.5W of PoE.

Powering the Cisco Aironet 1250, with its 18.5W power requirement, from a switch that supports only the IEEE 802.3af standard decreases network efficiency, because network managers must either add more equipment and cable to provide the additional power needed or resort to utilizing only one radio in the Cisco Aironet 1250. Although the Cisco Aironet 1250 could easily receive full power from an IEEE 802.3at-compliant PSE, that standard has not yet been ratified.

That is why Cisco developed Cisco Enhanced PoE, Cisco’s extension to the IEEE 802.3af standard that delivers as much as 20W per port of inline power for devices that support Cisco Discovery Protocol (CDP). Cisco Enhanced PoE is offered on Catalyst 3750-E and Catalyst 3560-E switches starting in February 2008 with Cisco IOS® Software Release 12.2(44)SE. The Catalyst 6500 Series10/100/100 PoE linecards support Enhanced PoE with 12.2(33)SXH2 or later and the Catalyst 4500 E-Series support Enhanced PoE with 12.2(44)SG or later. When, for example the Cisco Aironet 1250 is connected to a Catalyst switch supporting Cisco Enhanced PoE, the access point can use Cisco Discovery Protocol to request a power level from the switch that is higher than the 15.4 Watts described in the IEEE 802.3af standard. After the Catalyst switch receives the Cisco Discovery Protocol message for higher power, it will grant the increased wattage to the Cisco Aironet 1250.

Cisco Enhanced PoE is by no means a replacement for or in competition with the IEEE 802.3at (PoE+) standard. It is simply a means of delivering PoE in excess of 15.4W per port to those customers who must immediately implement technologies requiring it and cannot wait for the 802.3at standard to be finalized.”


To read the complete white paper click this link. Also I am thankful to all those gentlemen who posted their comments and tried to provide a solution. The current IOS version of the Cisco Catalyst 3750 E Catalyst Switch I have  is 12.2(35)SE5, let me upgrade the IOS and see whether I can enjoy the enhance power capabilities of 3750 E Switch.

June 21, 2010  9:13 AM

POE Compatibilty between Cisco 1252 Aironet Access Point & Cisco 3750 E POE Switch

Yasir Irfan Yasir Irfan Profile: Yasir Irfan

Recently one my colleague was trying to connect a Cisco 1252 Aironet Access Point without a power injector to a Cisco 3750 E POE Switch, but the device was not coming up, he was receiving the following log in the Cisco Aironet Access Point.

Jun 21 08:30:28.447: %CDP_PD-2-POWER_LOW: All radios disabled – NEGOTIATED WS-C3

750E-48PD (8843.e17f.f60d)

Jun 21 08:31:28.451: %CDP_PD-2-POWER_LOW: All radios disabled – NEGOTIATED WS-C3

750E-48PD (8843.e17f.f60d)

And when we checked the Cisco 1252 Aironet Access Point from the Internet Explorer we got this message.

Looking at the logs and graphical view I figured out the Cisco 1252 Aironet Access Point shut downed its radio interface as it was not getting the sufficient power.

Normally the Cisco 1252 Aironet Access Point requires more than 16 watts of power, whereas the Cisco 3750 E Switch is capable of providing maximum of 15.4 watts.

I am trying to find out a way to resolve these issues. The moment I get any resolution I will update you all folks.

June 20, 2010  5:09 AM

Cisco WebEx Connect IM can improve productivity for Customers

Yasir Irfan Yasir Irfan Profile: Yasir Irfan

Cisco Systems releases newest version of WebEx Connect IM, some of the features the newly released Cisco WebEx Connect IM (6.5) allows the users to access their contact lists and send messages via a browser –based IM client. With the browser-based IM client the solution can be accessible from any computer with any operating system, wow!

The Cisco WebEx Connect IM for Windows is now localized for French, German, Spanish, Italian and Japanese, further expanding its ease of use for global organizations.

The release of newest version of WebEx Connect IM brings logging on Server-side, which allows organizations to capture logs of all IM traffic for more efficient regulatory compliance.

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June 18, 2010  7:10 AM

Cisco Systems is hosting Techdays! Be part of it.

Yasir Irfan Yasir Irfan Profile: Yasir Irfan

Would you like to join the Cisco’s technical experts for an in-depth discussion about the latest innovations-products, features and like experience the demos and roadmaps to develop strategies and deploy solutions that increases resiliency, agility and productivity, then you have a golden opportunity.

Cisco Systems is hosting successful Tech Days series in your region to keep you informed about the latest developments in borderless networks, virtualization, and collaboration technologies starting 9th June to 30th June 2010.

City Date Registration Link
Memphis, TN June 9, 2010 Register Now
Melville, NY June 23, 2010 Register Now
Des Moines, IA June 23, 2010 Register Now
Grand Rapids, MI June 24, 2010 Register Now
Mobile, AL June 24, 2010 Register Now
Harrisburg, PA June 30, 2010 Register Now
Bloomington, IL July 14, 2010 Register Now

They are offering three tracks, unfortunately I am leaving the other part of the World, I know I am missing a great opportunity, I love Borderless Networks.

Borderless Networks Track

Learn how systems innovations across routing, switching, wireless, acceleration, and security help organizations deliver mobility, security, and performance to transform the way IT delivers and scales those services on the network.

Focus: Using the Network to Optimize TCO and Business Agility

Unified Communications Track

Learn how IP-based collaboration technologies can better position companies to operate more efficiently while using new mobile and web-based applications. Each session will cover solution strategies and roadmaps, practical demonstrations, and technical configuration and design principles.

Focus: Unified Communications on Cisco Unified Computing System: Virtualizing Cisco Unified Communications

Virtualization Track

The proliferation of data center virtualization is promoting an architectural transformation from network to storage to computing. Learn how Cisco and its partners provide an adaptive IT architecture that enables organizations to realize benefits today and in the future.

Focus: Unified Computing with Unified Fabric

June 16, 2010  5:49 AM

How to configure a DHCP server in a Cisco Aironet Access Points?

Yasir Irfan Yasir Irfan Profile: Yasir Irfan

If you want to configure DHCP service in Cisco Aironet 1100 and 1200 series Access Points its pretty simple. Dynamic Host Configuration Protocol (DHCP) server capability was first available on the Cisco Aironet 1100 and 1200 series Access Points (APs) in version 12.2(11)JA1.

When an AP is configured as a DHCP server, it can provide IP addresses to an Ethernet-capable PC connected to its Ethernet port or to wireless client devices that associate to the AP.

Following example shows how to configure DHCP service on the Cisco Aironet 1100 and 1200 series Access Points

ITKE-AP01#configure terminal

ITKE-AP01(config)#ip dhcp excluded-address –

ITKE-AP01(config)#ip dhcp pool ITKE

ITKE-AP01(dhcp-config)# network

ITKE-AP01(dhcp-config)#lease 20



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