vSphere v5.5 :: Are SSD Disks Worth it?

When I first built my ESXi server, I thought I’d invest in a good server to allow me to really get my  hands “dirty” with VMware. When it came to acquiring disks, I quickly realise that SSD drives were very expensive … so I ended up with SAS drives. Didn’t take long to find out it is possible to optimise Memory Resources by using SSD drives. I have therefore decided to invest in two 128 GB SSD drives but never really got the chance to actually put them to test. I connected and used them as local storage. Recently, prices…

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Admin Distance Bug?

Granted, this is a duplicate post as the one posted by Jeremy Stretch here. When I first read his post, I just couldn’t believe it so I thought I’d lab it myself. However, do notice that my lab here is just slightly different: I am advertising two networks (different from Jeremy’s lab) The two routing protocols have been set with identical administrative distances (Jeremy does this for the advertised route instead) I am assuming that the IOS version running on my routers is more recent (potentially different from Jeremy’s lab) Since I’m using Gig interfaces, I’ve updated the OSPF auto-cost ref. bandwidth…

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The ICMP Redirect

You will not find this very often though, you may come across a network where there are two routers on the same broadcast segment, each responsible for different networks. So how do you get your hosts to know which gateway should they use? You could setup two default gateways – both Windows and Linux allow that. However, you could also rely on ICMP Redirects. In this blog, I will show you what ICMP redirect is and in what circumstances it can be useful. I will be working on the following topology: The routing table on HOST1 and ROUTER1 look like…

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