In this last article of the series, we will explore how OSPFv3 NSSA areas inject routes external to the OSPF domain. In OSPFv2, this function is performed by NSSA-External (Type 7) LSAs. In OSPFv3, this is a function of, very creatively named, Type-7 (Type 2007) LSAs.
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In the previous two articles, we covered the introduction to LSAs used by OSPFv3 and detailed examination of Type 2001 (Router), Type 0008 (Link) and Type 2009 (Intra-Area-Prefix) LSAs. Today, we’ll take a look into Type 2002 (Network) LSA.
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In the previous article, we introduced different LSA types used by OSPFv3. In today’s article, we’ll introduce the testbed network for deeper look into them, as well as look deeper into three of the most fundamental LSAs used by OSPFv3 – Router, Intra-Area-Prefix and Link LSAs.
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In the last two articles in this series, I covered PIM register process in general, as well as how the process looks like when there is a source transmitting, but no interested clients. In this post, let’s explore how the process looks like when there are interested clients, but there is no source.
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Domain Name System (DNS) is one of the most fundamental network services, without which Internet as we know it today would be meaningless. Generally speaking, the purpose of the DNS is to provide “mapping” between human readable domain names, like for example ipexpert.com and IP addresses, understood and used by computers and routers. Again, generally speaking, DNS services are provided by DNS servers. If you are using Cisco router with newer IOS, you may not need a server for a very basic DNS functionality. Sometimes, even a bit trickier configurations can be done using IOS. Let’s examine how.
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