Networking
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Copper 10g Twinax cables not linking
Most by now are running 10g network connections at least in the core network or especially in virtualization environments with top of rack switches aggregating network traffic from ESXi hosts. I ran into an issue recently with copper 10g twinax…
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GNS3 Beta Packet Capture between QEMU devices
One of the cool things that you can do with GNS3 is packet captures between devices. However, if you are using QEMU (Quick Emulator) Cisco image devices, the current stable release of GNS3 does not support packet captures with QEMU…
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Use VIRL Images in GNS3
In the first post of the GNS3 VM series, we looked at how to setup GNS3 VM VMware ESXi. One of the awesome features of the new GNS3 VMs is that you can actually use your VIRL images in GNS3…
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Setup GNS3 VM VMware ESXi
GNS3 has definitely matured as a product and offers tremendous functionality especially if you look at the cross vendor platform support that it offers. I definitely prefer the interface of GNS3 over other products such as VIRL. VIRL is maturing…
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Dell Openmanage Network Manager 6.2 Appliance Install and Configure
For those not familiar, Dell has a neat network management tool that can manage network equipment and others. This is available by way of an OVA appliance download as well as other installs. Let’s take a look at the Dell Openmanage…
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How to Upgrade Dell Nseries Firmware
A quick post on how to upgrade Dell Nseries Firmware and the process involved. What you will need is a TFTP utility of your choice running on the network as well as the latest firmware file for your Nseries switch,…
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What happens Same IP Range different subnet mask
I had this question posed to me the other day and it is one of those curiosity questions that you may have asked before or perhaps had a situation that presented itself that gave cause to thinking about this question.…
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VIRL vs GNS3 vs Packet Tracer which one
Network simulators are a great resources for mocking up certain scenarios, learning, certifications, and plain old “what will happen if I do this in my network” testing. There are are a variety of simulators available out in the wild for…
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Troubleshooting VMware Workstation Network connectivity
Typically, I use VMware Workstation every day running work VMs and performing other testing. I also troubleshoot VMware Workstation for other users as well. From time to time, I have seen issues with VMware Workstation network connectivity either in Bridged…
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Configure Dell Nseries switch stack
A quick little how to post on creating a stack between Dell Nseries switches. For the purposes of this post, the stack was created using (2) Dell Nseries 4032F 10G switches. There is just a small amount of configuration that…
