From the monthly archives: March 2009

Cisco: How to use reflexive access-list and why they are useful

By On March 30, 2009 · 4 Comments

Reflexive access-list are one of the method that help us achive firewall functionality with a router hardware. The other methods that serve to the same purpose are Context-Based Access Control (CBAC) and TCP Intercept. For an introduction to CBAC with example please check my older post Cisco: Use CBAC to achieve firewall functionality on router device . For TCP Intercept check my blog in the next weeks.

Today, I will present Reflexive access-list [...]

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Cisco Unified Computing System

By On March 29, 2009 · 2 Comments

[flashvideo filename=http://www.firstdigest.com/vid/archive/2009/03/CiscoUnifiedComputingSystem.flv image=http://www.firstdigest.com/vid/archive/2009/03/CiscoUnifiedComputingSystem.jpg /]

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7 reasons why MPLS has been wildly successful

By On March 29, 2009 · Leave a Comment

The IETF Thursday threw a birthday party for one of its most successful standards: Multi-Protocol Label Switching.

The Internet’s leading standards body hosted a panel discussion outlining the reasons why the 12-year-old protocol has been so widely deployed and such a big moneymaker for carriers.

“MPLS is one of our wildly successful protocol suites,” said Loa Andersson, co-chair of the IETF’s MPLS Working Group and the principal networking architect at the Swedish Research Institute, Acreo AB. Andersson served as moderator for the panel, which was [...]

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Cisco certification: Important content change in CCIE Voice Lab Exam

By On March 27, 2009 · Leave a Comment

This announcement is from The Cisco Learning Network:

Effective July 16th, 2009, important content changes will be implemented in the CCIE Voice Lab Exam. Candidates for lab exams scheduled July 16th, 2009 or later should prepare using the v3.0 Lab Equipment and Software Versions. Candidates scheduled on or before July 15th, 2009 should continue using the v2.0 Lab Equipment and Software Versions.

You can examine the v3.0 CCIE Voice Lab print below:

1.00 Implement and Troubleshoot Campus Infrastructure and [...]

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IETF to explore new routing technique

By On March 27, 2009 · Leave a Comment

The IETF is forming a new working group to address scalability issues in the Internet’s routing system caused by companies splitting their network traffic over multiple carriers, a practice called multihoming.

The new working group will build upon a base proposal from a team of Cisco engineers to create a new tunneling mechanism that will be used by the Internet’s edge and core routers.

The new mechanism — dubbed LISP for Locator/Identifier Separation Protocol — is designed to reduce the number of entries in the [...]

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Cisco security updates squash router bugs

By On March 26, 2009 · 1 Comment

Cisco has released eight security updates for the Internetwork Operating System (IOS) software used to power its routers.

The patches were released Wednesday, the day Cisco had previously scheduled for its twice-yearly IOS updates. None of the bugs had been publicly disclosed ahead of Wednesday’s updates, but some of them were reported to Cisco by outside sources.

Most of the bugs could be exploited by attackers to crash or somehow disrupt service to a router, typically if a specific, vulnerable service is enabled, Cisco said.

[...]

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Vote Earth! Switch Off Your Lights For Earth Hour

By On March 23, 2009 · 2 Comments

This post has nothing with tech section…or maybe everything!

Cuddling up with your loved ones and admiring the stars in the night sky or organising a treasure hunt in the dark? At 8:30pm on Saturday 28 March, people from all corners of the world will turn off their lights for one hour – Earth Hour – and cast their vote for action on climate change. Anybody can participate and join together with millions of people across the globe celebrating Earth Hour.

Earth [...]

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How to integrate GNS3 with Virtual PC

By On March 23, 2009 · 12 Comments

In this article I want to show you how to extend your posibilities to test a network in GNS3. Sure, it’s simple sometime to use a Loobpack interface on one of your edge routers to simulate an external network, but sometime is useful to have something connected to the router port. Take as an example QoS marking and classification. If you want to mark something inbound, then you need a connection to the router port where you want to [...]

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What it will take for mobile VoIP to get enterprise-ready

By On March 23, 2009 · Leave a Comment

By all rights, mobile VoIP sounds like an enticing proposition for a lot of companies.

After all, what enterprise wouldn’t jump at the opportunity to save money on their mobile phone bills by sending their wireless calls over an IP network rather than a cellular network? But despite this attractive premise, current mobile VoIP technology has yet to evolve to the point where users can simply switch on their phones anywhere and expect to connect to a secure IP network.

The obvious reason for this [...]

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10 tips that I can tell you about Cisco CCIE exam preparation

By On March 20, 2009 · 5 Comments

Since now I’m closer than ever to my CCIE lab exam, I thought that it would be a good opportunity to share some of my preparation experience with you. Even if this post is focused of the CCIE preparation, I believe that you can take my advices into consideration even if you are preparing for some other exam.

As most of you, when I started the preparation I searched on the Internet about some advices like what should I read, how much time to [...]

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