Network technologies and trends

September 27, 2009  4:45 AM

How to configure Trunking between a Cisco Catalyst and a 3Com SuperStack?

Yasir Irfan Yasir Irfan Profile: Yasir Irfan


I am writing this article to answer the question  for establishing the trunking between a Cisco Catalyst Switch and a 3Com Super Stack Switch in ITKE community.


The goal of the article is show the user how to configure an inter operable trunk port in both Cisco and 3 Com Switch. As far as trunking concepts are concerned I did posted an article in ITKE blog comparing the HP Procurve and a Cisco Catalyst Switches which help to understand the trunking methodologies applied in 3 Com and Cisco Switches.

In order understand the configuration process easily I present a scenario, based on this scenario we will configure the Cisco and 3 Com Switches to meet the objectives.


In this example 

·         A Cisco Catalyst Switch is connected to a 3-Com Super Stack 4200 Switch (3-Com Super stack 3300 configuration is also available as the configuration process defers in a 3300 Switch)) using a port fast /Giga Ethernet 1 in both the Switches.

·         Create two VLANS locally in both the Cisco Catalyst Switch and a 3-Com Super Stack 4200.

1.       VLAN 100 – For Workstations (named PCS).

2.       VLAN 200- For Servers and Management Devices (Named MANG).

·         Configure fast Ethernet 0/1 on both the Cisco Catalyst Switch and a 3-Com Super Stack 4200 as 802.1 q trunking port.


Cisco Catalyst Switch Configuration Example


Task 1 – Create VLANS


ITKE-Cisco#configure t

Enter configuration commands, one per line.  End with CNTL/Z.

ITKE-Cisco(config)#vlan 100

ITKE-Cisco(config-vlan)#name PCS   


ITKE-Cisco(config)#vlan 200

ITKE-Cisco(config-vlan)#name MANG


Task 2 – Configure the port fastethernet 0/1 as 802.1 q trunk port.


ITKE-Cisco(config)#interface fastEthernet 0/1

ITKE-Cisco(config-if)#description Connected to 3-COM Switch

ITKE-Cisco(config-if)#switchport trunk encapsulation dot1q

ITKE-Cisco(config-if)#switchport mode trunk

ITKE-Cisco(config-if)#no shutdown



Task 3 – Configure the ports fastethernet 0/5 for VLAN 100 and fastethernet 0/10 for VLAN 200.

ITKE-Cisco(config)#interface fastEthernet 0/5

ITKE-Cisco(config-if)#description Connected to PC


ITKE-Cisco(config-if)#switchport mode access

ITKE-Cisco(config-if)#switchport access vlan 100


ITKE-Cisco(config)#interface fastEthernet 0/10

ITKE-Cisco(config-if)#description Connected to SERVER

ITKE-Cisco(config-if)#switchport mode access

ITKE-Cisco(config-if)#switchport access vlan 200


3-Com Super Stack 4200 Switch Configuration Example (Configuration steps are as per the 3-Com Advance configuration manualnot tested).

Task 1 – Create VLANS and add ports Giga Ethernet 0/5 for VLAN 100 and Giga Ethernet 0/10 for VLAN 200


<SwitchB> system-view

[SwitchB] vlan 100

[SwitchB-vlan100] description PCS

[SwitchB-vlan100] port GigabitEthernet 1/0/5

[SwitchB-vlan100] quit


Create VLAN 200, and add GigabitEthernet1/0/10 to VLAN 200.

[SwitchB] vlan 200

[SwitchB-vlan200] description MANG

[SwitchB-vlan200] port GigabitEthernet 1/0/10

[SwitchB-vlan200] quit



Task 2 – Configure the port Gigaethernet 1/0/1 as a trunk port.


[SwitchB] interface GigabitEthernet 1/0/1

[SwitchB-GigabitEthernet1/0/1] port link-type trunk


3-Com Super Stack 3300 Switch Configuration Example.

Task 1 – Create VLANS

Select menu option (bridge/vlan): create

Select VLAN ID (2-4094)[3]: 100

Enter VLAN Name [VLAN 10]: PCS


Select menu option (bridge/vlan): create

Select VLAN ID (2-4094)[3]: 200

Enter VLAN Name [VLAN 11]: MANG



Task 2 – Configure the port fastethernet 0/1 as 802.1 q trunk port

Select VLAN ID (1-2,) [1]: 100 – 200

Select bridge ports (AL1-AL4,unit:port…,?): 1:1

Enter tag type (untagged,tagged): tagged


Task 3 – Configure the ports Giga Ethernet 0/5 for VLAN 100 and Giga Ethernet 0/10 for VLAN 200


Select menu option (bridge/vlan/modify): add

Select VLAN ID (1-2,)[1]: 100

Select bridge ports (AL1-AL4,unit:port…,?): 1:5

Enter tag type (untagged, tagged): untagged


Select menu option (bridge/vlan/modify): add

Select VLAN ID (1-2,)[1]: 200

Select bridge ports (AL1-AL4,unit:port…,?): 1:10

Enter tag type (untagged, tagged): untagged

September 26, 2009  7:20 AM

Cisco Launches SA 500 Series Security Appliances, specifically designed and priced to meet small business needs

Yasir Irfan Yasir Irfan Profile: Yasir Irfan


If you are having an Organization with 100 employees or less and you are looking for an appropriate Security device to protect your Organization from the frequently growing internet threats, also offering  secured  wireless,  offering Virtual Private Network (VPN) services to remote branch offices and on to go employees, with a firewall and optional email and web security capabilities. Here is the answer, the Cisco SA 500 Series Security Appliance. Cisco Systems recently launched the Cisco SA 500 Series Security Appliance recently exclusively for Small to Medium size business.

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The Cisco SA 500 Series Security Appliance comes in three models; SA 520, SA 520 W and SA 540,  each of these  models features the integrated firewall, support for the Trend Micro ProtectLink Gateway and network ports which are capable of working at 1 Giga Speed.  Here are some of the features of the Cisco SA 500 Series Security Appliance. Only SA 520 W is capable of supporting Wireless (802.11 b/g/n capabilities) working in the 2.4 GHz range with high encryption capabilities.


·       Secure remote access to business information with a built-in stateful packet inspection (SPI) firewall and VPN capabilities.

·       Increased security of remote access: With support for optional VeriSign Identity Protection (VIP), the Cisco SA 500 Series provides two-factor authentication and one-time-use password access control.

·       Lower costs associated with deployment and management based on a single, easy-to-install, easy-to-use solution.

·       Prevent security breaches from email threats or malicious websites that could lead to disruption of business-critical applications and services.

·       Increased employee productivity by helping prevent spam, spyware, and inappropriate web browsing with the optional Trend Micro ProtectLink Gateway.

·       Easy deployment and management: The embedded Security Appliance Configuration Utility offers comprehensive configuration and monitoring of all the services in a single application.

·       Affordable service coverage: The highest level of performance and reliability to keep your business running smoothly. Check out Small Business Pro Service.

In conclusion Cisco SA 500 Series Security Appliances is designed to solve Small business problems.  For more information visit the Cisco SA 500 Website.


September 16, 2009  11:01 AM

Cisco Press launches new title addressing FCoE standard

Yasir Irfan Yasir Irfan Profile: Yasir Irfan


In one of my older post in June I was just taking about the FCoE (Fiber Channel over Ethernet) as a standard. Cisco Systems was one of the major contributors to establish the FCoE Standard.  Like a responsible vendor now Cisco Press has come up with a new title I/O Consolidation in the Data Center. This title is a fully updated version of Silvano Gai’s privately-published book on FCoE, written for leading FCoE pioneer Nuova Systems before the company was acquired by Cisco. Nearly 12,000 copies of that book have already been distributed, demonstrating the immense interest in FCoE technology, and the scarcity of reliable information that has existed about it.

The new title I/O Consolidation in the Data Center deals with the recently approved FCoE standard. According Cisco Press Senior Publicist Jamie Adams the new title comprises of five detail case studies illustrating typical FCoE adoption scenarios, as well as extensive Q & A section addressing issues raised quite often by the Enterprise IT professionals.

For more details do check out the Cisco Press product description.

September 14, 2009  9:33 PM

Microsoft Unveils Thinnest Keyboard!

Yasir Irfan Yasir Irfan Profile: Yasir Irfan


Recently I was browsing a press release from Microsoft about the thinnest keyboard ever available, which is slightly thicker than an AAA battery.

Pic Courtesy: Microsoft


The newly designed keyboard is exclusively for Bluetooth computers, and Microsoft called this keyboard as Mobile Keyboard 6000. The Mobile Keyboard 6000 comes with a ‘Comfort Curve’ that gives your wrists a rest with a slight 6-degree curve. While it might not seem like a big deal, Microsoft has already sold more than 10 million of its Comfort Curve keyboards so there’s definitely a wrist-concerned market out there.  One more unique feature of Mobile Keyboard 6000 is number pad can be separated and used separately.


Microsoft will be selling the Mobile Keyboard 6000 next month for $89.95. But if it’s just the Number Pad you’re after, you’ll need to spend $44.95.

September 14, 2009  9:16 PM

Review for the CCNP BSCI Official Exam Certification Guide, Fourth Edition

Yasir Irfan Yasir Irfan Profile: Yasir Irfan

I am always inspired by the Cisco Press books which are my only source for my career success. When it comes to certification study guides, Cisco Press leads from the front.  In this article I will try to review the CCNP BSCI Official Exam Certification Guide, Fourth Edition, this study guide is a first and final step towards your CCNP success.


As promised by Cisco Press the CCNP BSCI Official Exam Certification Guide, Fourth Edition, is indeed a best breed of Cisco® exam study guide which specifically focuses on the objective of CCNP BSCI 642-901 exam. The study guide comprises of over 600 pages divided into 21 chapters.  Which covers essential routing principles, EIGRP, OSPF and IS-IS in dept as well as basic BGP configuration.


The study guide has concentrated a bit more on Multicasting and multicast routing and the IPv6 is explained well but not in too dept.  The best part I liked about the CCNP BSCI Official Exam Certification Guide, Fourth Edition, is the Cisco IOS® routing features.


The CCNP BSCI Official Exam Certification Guide, Fourth Edition, comes with a companion CD from boson which consists of an electronics books and more than 200 practice questions which also included simulation-bases questions available in study mode, practice mode and flash card format.


Some of the features which I liked most in the CCNP BSCI Official Exam Certification Guide, Fourth Edition,   “Do I know this already?” quizzes and “Foundation Summaries” that start off each chapter. These allow the reader to assess what they already know about an upcoming section and what they need to focus on. The end-of-chapter “Q&A” will solidify any knowledge you have gained or need to review. Also the scenarios provided at the end of the chapters are worth from exam point of view.


Overall a good supplement for the exam, but the CCNP BSCI Official Exam Certification Guide, Fourth Edition, cannot be a sole resource for the exam. It’s always good to use the resources available at the Cisco learning websites.  Finally I would rate 4 out of 5 for this study guide. Better luck folks and hope to see you all passing the CCNP BSCI 642-901 exam at first attempt. 


September 14, 2009  7:56 AM

R & M brings revolution by launching the new product Cat. 6A – Copper Cabling for High-Performance Data Networks

Yasir Irfan Yasir Irfan Profile: Yasir Irfan

Yesterday I received an email from the Area Manager Mohammed Fazal, of the leading Swiss cabling specialist, Reichle & De-Massari. According to his email R & M unveiled a major breakthrough in copper cabling, a new RJ45 connection module which meets the Cat. 6A standard as specified by ISO/IEC had been launched.


Jean Pierre Labry, managing director of R&M Middle East & Africa, said: “Cat 6A is the key to new maximum performance and greater operating reliability in data networks.”


He also added that the new devices allow companies to boost their network’s bandwidth and transmission quality without having to abandon the reasonably-priced and reliable RJ45 connector standard.





In a recently held Ineltec conference in Basel R & M unveiled the high speed RJ45 connection module.


The R & M development lab has discovered a new way of shielding individual twisted pairs from electromagnetic interference and the company claims the new devices will be suitable for transmission of data at speeds greater than 10Gbps.

Also check the press release from R & M.

The new research sponsored by Brockade and Eaton suggests still data centers are being driven by performance issues.

September 14, 2009  7:50 AM

According industry group’s latest report, Data centre’s cooled too much!

Yasir Irfan Yasir Irfan Profile: Yasir Irfan


According to the new study done tje by leading industry group, almost all Data Centers are cooled to a temperature lower than the required temperature for the normal operation of a Data Center.



The group comprised of representatives Intel, IBM, Liebert, HP and the Lawrence Berkeley National Lab, found almost all Data Centers in a survey of the US Data Center Users Group were cooled much below temperature than the recommended temperature of 27°C.


The recommended temperature for the Data Centers of 27°C was proposed by American Society of Heating, Refrigerating and Air Conditioning Engineers (ASHRAE).


The study also estimates the potential energy savings that could be achieved if data centres could be operated closer to the recommended limit as being as high as 90% energy savings for CRAHs.


The report can be downloaded here.

September 12, 2009  7:34 AM

How to capture a text using PuTTY client?

Yasir Irfan Yasir Irfan Profile: Yasir Irfan


PuTTY doesn’t need any introduction as its one of the widely used for remote console utility. PuTTY is an SSH and telnet client.

In day to day operational activities we do telnet or SSH to our Cisco routers or Switches, at times we need to backup a running or startup config or   a Cisco router or a switch or even some times we need to capture the terminal session logs for technical information etc.  This is can be easily done by using the PuTTY client.

I will show you how to capture a text using PuTTY client.

Once you have established a remote session with a Cisco router or a Switch, follow the following steps


Step 1: Right Click on the menu bar and select “Change Settings”


Step 2: Click logging under the icon Session.


Step 3: Then select “All Session Output”.


Step 4: Select the location using the browse button and enter the desired file name and click apply.


These steps will create the log file in the specified location and it will log everything you did in that particular telnet or SSH session.

September 8, 2009  9:45 AM

Remote Telnet useful tips!

Yasir Irfan Yasir Irfan Profile: Yasir Irfan


We all work remotely with Cisco routers and Switches, we often do login to do some configuration changes in the Cisco routers and Switches. What if we configured wrongly in the live Cisco routers and Switches which are located in the remote sites, we don’t enjoy the liberty of resetting the devices unless we have control over the power distribution.


In this scenario the “reload” command proves to be very handy and useful. Just before making any changes to the configuration we can use the “reload” command as demonstrated below


ITKE-Cisco#reload in ?

Delay before reload (mmm or hhh:mm)


ITKE-Cisco#reload in 10


System configuration has been modified. Save? [yes/no]: no

Building configuration…


Reload scheduled in 10 minutes by yasir on vty0 (

Proceed with reload? [confirm]






*** — SHUTDOWN in 0:05:00 —



The above demonstrated command will reload the device in 10 minutes. After applying the “reload” command we can proceed with the configuration changes. If things go wrong and we lost connectivity

to the device, then try back after 10 minutes as the device will get reloaded with the original startup-configuration which can helps us to restore the connectivity to the device.


Once we are sure about the new configuration and its working properly without any hassles there is always a way  “reload cancel” command is there to cancel the reload.


ITKE-Cisco#reload cancel


I find this command to be very handy and useful especially when we have to telnet or SSH to remote Cisco router or a Switch.

September 5, 2009  8:32 PM

Review for Interconnecting Data Centers Using VPLS

Yasir Irfan Yasir Irfan Profile: Yasir Irfan


Interconnecting Data Centers Using VPLS is a book which aims at providing solutions that provide a high speed, low latency network and spanning tree protocol (STP) isolation between data centers based on Virtual Private LAN Service (VPLS).

Pic Courtesy: Cisco Press

The book makes interesting reading, especially as it covers in detail about the architecture design and configuration required to interconnect data centers as well as case studies to interconnect Data Centers.  This book is targeted to Systems professionals and System engineers who are into designing solutions for interconnecting data centers which ensures high availability Layer 2 connectivity and STP isolation.

The authors Nash Darukhanawalla and Patrice Bellagamba started the book with explaining the need for high availability of the Data Centers, explaining the concept of the high availability clusters, introduction to Virtual Private LAN Service (VPLS), MPLS traffic engineering.

The authors’ present different flavors of data center interconnect solution using different combination of Spanning Tree modes, VLAN mapping as well other criteria’s along with complete configuration required at the  aggregation switches and provider edge routers.

The book is divided into 13 chapters, and it also deals with issues related to layer 2 bridging domains and provides guidance to extend VLANs using Virtual Private LAN Service (VPLS). This book contains lot of reference network diagrams which can help the readers to understand the presented solutions in normal mode as well as in failover mode.

I found this book extremely readable and enjoyable and I would recommend this book to the folks who are interested in knowing more about the Virtual Private LAN Service (VPLS). The book comes with lot of useful information which will definitely help the readers to get familiar with the Virtual Private LAN Service (VPLS) concepts and configuration steps required for interconnecting data centers.

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