TAP Into Technology | Blog

Tony Fortunato

Tony Fortunato is a Senior Network Performance Specialist with experience in design, implementation and troubleshooting networks since 1989. Tony will teach or troubleshoot on your live network as part of his customized onsite training service for your staff.
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Recent Posts

[Video] VLAN Analysis with Wireshark 2.0

Posted by Tony Fortunato on 5/16/17 8:00 AM

When I teach Wireshark classes, I commonly get asked, “What do I do when I get back to my desk?”, “What if I can’t span a port, or don’t have a TAP?”

I typically show my attendees dozens of “Baselines” that would only take a few minutes to complete.

Here’s an example of one of my favorite baselines; Start a capture and analyze whatever you see. No taps, span or mirror ports.

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Topics: Network Visibility/Monitoring, Wireshark

[Video] How To Determine DHCP Option 60 Value Using Wireshark

Posted by Tony Fortunato on 4/11/17 8:00 AM

There are an increasing number of network attached devices, and trying to keep them organized gets to be challenging. Since different devices might require different IP configuration settings and statically configuring them isn’t realistic.

There are several approaches to deal with this.

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Topics: Network Visibility/Monitoring, Wireshark

[Video] Weird by Works: Fixing Drag and Drop With VMware Workstation 12

Posted by Tony Fortunato on 3/9/17 8:00 AM

VMWARE and virtual machines in general should be a very important part of your tool kit.  Virtual environments allow you to better familiarize yourself with different operating systems or test without affecting your real environment or equipment. Applications such as GNS3, Packet Tracer are great network simulators and VMWARE and VBOX are examples of computer operating system emulators.

I thought I would share what I figured out when working with VMWARE workstation and Microsoft Windows guest operating system.

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Topics: Network Management, Network Visibility/Monitoring

[video] Observing The Impact Multiple Default Gateways With Wireshark

Posted by Tony Fortunato on 2/16/17 8:00 AM

I was speaking with a client the other day and they were asking me how Microsoft behaves if a device has two default gateways.

One thing I have to say about my job and clients, I always get interesting scenarios and questions to figure out.

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Topics: Network TAPs, Network Visibility/Monitoring, Wireshark

[Video] SPAN vs TAP Comparison

Posted by Tony Fortunato on 4/14/16 8:00 AM

I want to address the age old argument of SPAN vs TAP. Over the years I’ve read a few articles covering the points you should be familiar with when working with either. Most of the articles cover similar points; SPAN will not forward corrupted packets and that it can drop packets.

What I haven’t seen is material addressing the timing issue as well as a realistic load of approximately 9%. Here's what my video shows...

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Topics: Network TAPs, TAPs vs SPAN

QUICK TIPS: Installing Multiple Cisco Switches

Posted by Tony Fortunato on 1/7/16 12:30 AM

In the Field - I was working with a project team installing over 100 Cisco switches across three towers. Daunting as that is, it was also an active construction site, which means power is not reliable and in some cases and no elevators were available.

In this blog we will go over a quick tip that may be useful when installing multiple switches.

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Topics: Network Management, Technology Partners, Cisco Solutions