Posts Tagged ‘networking’

XenServer, Hyper-V, and ESXi – Architecture, API, and Coding

Monday, December 24th, 2012

VirtualizationBelow is a link to the slide deck for a presentation I gave to some friends/colleagues for a Berkeley Virtualization and Cloud Computing certification course I took in early 2012. For my final project I did a XenServer, Hyper-V, and ESXi hypervisor comparison in regards to market share, architecture/installation, and APIs/coding. The project involved not only a presentation but coding for all three hypervisors – XenServer, Hyper-V, and ESXi. Technical details, demos, and coding examples are provided in the presentation. You can also download all code from either the download section of this site or for the latest code updates download from GitHub. (more…)


Multi-Area OSPF – Redundancy, Route Summarization, and LSA Filtering

Monday, July 9th, 2012

In this lab, all routers except for R4 and R5 are Cisco 3725 routers [IOS 12.4(15)T10]. Routers R4 and R5 are Cisco 7200 routers [IOS 12.4(24)T]. Below is the network diagram for this lab.


Important IPv6 Addresses

Tuesday, May 1st, 2012

For easy reference, I’ve listed some important IPv6 address ranges below. (more…)


Possible Reasons for LAN Traffic Congestion

Saturday, July 30th, 2011

If you are experiencing slowness on your LAN here are some possible reasons that you can investigate:


Functionality of Layer 2 Switches/Bridges

Thursday, May 26th, 2011

Layer 2 Switching

Layer 2 Switching (STP Needed)

Layer 2 switches and bridges switch frames on a network while layer 3 routers route packets between networks. I once heard a network engineer being asked if a network can be made faster if the network is optimized to use more switches than routers. The network engineer answered that it shouldn’t matter. Of course, this is wrong. Think about it, if your network is just switching, the switches do not have to concern themselves with looking at the network layer; this significantly cuts down on the overhead since there is no need to decode the network header information at every stop like is done by a router. There are some concerns to keep in mind if your network starts to get too big which I discuss near the end of the blog. (more…)