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Wael Osama

Life Follows a Plan, but the Plan is not Yours !

70 days passed since I wrote my last post about IPv6 Addressing. Long time, however I didn’t feel it. Maybe I even forgot what I was doing here or planning to do, those 70 days actually carried a lot of unplanned events. My last post was on 24th of January and on 25th of Januaray it all started with protesters in Tahrir square asking for justice and equality for all the Egyptians, that was the begining and it ended by me now writing this post from Amsterdam, Netherlands where I currently work. Those revolutionary days had a lot of lessons, …

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Private IP address ranges

IPv4 Private Address Ranges:   10.0.0.0/8 IP addresses: 10.0.0.0 — 10.255.255.255. 172.16.0.0/12 IP addresses: 172.16.0.0 — 172.31.255.255. 192.168.0.0/16 IP addresses: 192.168.0.0 – 192.168.255.255   Private IPv4 internet address ranges are defined in RFC1918 with the motivation to control growth of the internet routing tables and to preserve IPv4 addresses space to extend it’s life. The private ranges defined in this RFC are not routable over the internet and are intended for internal use only in private Internets/Intranets and that means these packets destined to these ranges will not be routable across the internet and should stay within the private network. …

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IPv6 Tutorial: IPv6 Addressing #1

I am back again with the second post in this series, in the first post we had an overview of IPv6 and the need for it in the near future. In this post we will start breaking the technical ice of IPv6; I am going to discuss basic IPv6 addressing. This will need more than one post to finish. My philosophy for this series will be “Cut the jargon and keep things, simple and straight as possible”. That’s why I will try to keep it short and to the point . Let us begin: IPv6 Address size and space: This …

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IPv6 Tutorial: The overview

I will start from the beginning; two weeks ago I wrote a post claiming that IPv4 is depleting and IPv6 is coming soon; and since we are considering deploying IPv6 soon in our network, I thought it might be useful to write about IPv6 migration and transition strategies. Although, this is important but I think the readers of this blog including me will benefit more if we start at the beginning even if it takes longer to get where I wanted to start. I will start small and build up as we go toward the new IPv6 internet. Get yourself …

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7 Actions to get your network ready for IPv6

IPv4 is depleting so fast and time comes to get ready for IPv6. IPv6 may come to real life by 2012/2013. I am making a big claim here and I think I need to back it up with some facts: IPv4 address space is estimated to deplete somewhere in 2011. Check this Report. U.S government agencies are ready for IPv6 since June 2008. Large service providers are IPv6 ready or being ready now. Google your service provider. Content providers are preparing for IPv6. Google is one of the leaders in this transition. Just do a simple search to see the …

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BGP Attributes: Local Preference Attribute

The local preference attribute is a well-know discretionary attribute. This means local preference must be recognized by all BGP implementations, but will not exist in all BGP update messages; specifically it will not exist in E-BGP update messages. BGP local preference attribute is one of the most used attributes in BGP real world to influence traffic. Local preference attribute is a four octet field of information that is used to inform internal peers about the autonomous system internal preference for an advertised route.

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