From the monthly archives: June 2009

Useful documentation sheets at packetlife.net

By On June 29, 2009 · 2 Comments

Packetlife.net offers some “cheat sheets” with useful information. This are like very small handbooks with the most useful informations about BGP, EIGRP, IPsec, Multicast, IS-IS, OSPF, Spanning-Three, TCPdump and more. I found this very useful during my preparations for Cisco exams and not only, so I want to share them here. Of course any copyrights goes to the owner of packetlife.net. And if you are worry about the “cheat” word, look what the owner of packetlife.net is saying:

“Are these for [...]

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Cisco: How to use CEF for load-balancing

By On June 29, 2009 · 3 Comments

According to Cisco’s website, Cisco Express Forwarding (CEF) is advanced, Layer 3 IP switching technology. CEF optimizes network performance and scalability for networks with large and dynamic traffic patterns, such as the Internet, on networks characterized by intensive Web-based applications, or interactive sessions.

The term Load balancing describes a functionality in a router that distributes packets across multiple links based on layer 3 routing information.

Now, putting this two terms together we obtain Load balancing with CEF. Cisco IOS software [...]

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Wireshark 1.2.0 is now available

By On June 17, 2009 · 1 Comment

Wireshark 1.2.0 has been released and it’s available for download. This is suppose to be a major release according to the developer’s website, as the previous version is 1.0.8. Some new features, from the official Wireshark website, regarding the new version you can find below:

New and Updated Features

The following features are new (or have been significantly updated) since version 1.0:

Wireshark has a spiffy new start page. Display filters now autocomplete. A 64-bit Windows (x64) installer is now provided. [...]

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3G Solutions for Cisco Integrated Services Routers

By On June 16, 2009 · Leave a Comment

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Cisco: OSPF conditional inject of a Default Route

By On June 16, 2009 · 5 Comments

I believe most of you are familiar how OSPF is injecting a default route in a normal area. If not, you can find here all the documentation that you need. Please be familiar with this concept before reading this article.

Now, let’s assume that we have the following topology (click on image to have a more detailed view) :

As you can see we [...]

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Cisco Hosts Investor Webcast: Consumer Strategy

By On June 16, 2009 · Leave a Comment

Source: http://newsroom.cisco.com

June 15, 2009 – Cisco will host a webcast for the financial community with a corresponding slide presentation to discuss the company’s Consumer strategy, highlighting its consumer vision, market opportunity and expansion of its portfolio.

Who: co-hosted by Cisco executives, Ned Hooper, senior vice president of Corporate Development and Consumer, and Guido Jouret, vice president, chief technology officer of the Emerging Technologies Group. Following a brief presentation, a question & answer session will be held.

No previously unannounced issues will be discussed in [...]

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Cisco: How to determine the serial number of hardware components

By On June 12, 2009 · 2 Comments

Some days ago I had to check for the serial number of a faulty fan tray that need to be exchanged in C6500 series. Now most of you I believe know the commands “show version” or “show hardware” which will get all the information that you need most of the time, but not always. I decided to put in this post some useful commands to identify the Cisco hardware components and their respective identifiers (serial nnumber) on different platforms.

I will use for my example [...]

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New DOS attacks threaten wireless data networks

By On June 8, 2009 · 3 Comments

Forget spam, viruses, worms, malware and phishing. These threats are apparently old school when compared to a new class of denial-of-service (DOS) attacks that threaten wireless data networks.

The latest wireless network threats were outlined in a talk here Thursday by Krishan Sabnani, vice president of networking research at Bell Labs, at the Cyber Infrastructure Protection Conference at City College of New York.

Sabnani said the latest wireless data network threats are the result of inherent weaknesses in Mobile IP, a protocol that uses tunneling [...]

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Cisco’s take on 4G

By On June 8, 2009 · 3 Comments

Cisco is predicting that the advent of 4G services will lead to an explosion of new video applications that will transform telecom service providers into what the company is dubbing “experience providers.”

Suraj Shetty, the vice president of marketing for the Cisco Worldwide Service Provider Marketing, said during an interview this week that companies’ investments in high-speed wireless broadband technologies such as WiMAX and Long Term Evolution (LTE) will make high-definition video streaming widely available on both fixed and mobile devices. The upshot of this, [...]

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Cisco adds rack server to data center computing system

By On June 4, 2009 · 2 Comments

Cisco this week extended its Unified Computing System data center convergence platform with rack mountable servers, saying the new form factor represents an “entry level” into UCS and more choice for customers.

Cisco, however, did not disclose pricing for the 1RU and 2RU servers, which will be available in the fourth quarter.

The new C-Series rack-mount servers are designed to help accelerate the adoption of the Cisco unified computing and data center virtualization system. Like the predecessor B-Series blades, the C-Series rack mount servers utilize [...]

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