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2019/Multiple_Switches_Can_Slow_A_Network/docs/1.tex

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+\documentclass[11pt]{article}
+%Gummi|065|=)
+\title{\textbf{Multiple Switches can Slow a Network Down}}
+\author{Steak Electronics}
+\date{2019}
+\begin{document}
+
+%\maketitle
+\textbf{Multiple Switches can Slow a Network Down}
+\section{Overview}
+A question is, can multiple network switches, slow down either the network or the WAN. The answer is yes. Let's discuss a working example today.
+\section{Work Log}
+
+
+
+
+
+\end{document}

2019/Multiple_Switches_Can_Slow_A_Network/docs/1.tex~

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+\documentclass[11pt]{article}
+%Gummi|065|=)
+\title{\textbf{RPI 3 Portable Camera}}
+\author{Steak Electronics}
+\date{2019}
+\begin{document}
+
+%\maketitle
+\textbf{RPI 3 Portable Camera Station}
+\section{Overview}
+Use an RPI3, put in waterproof enclosure, add wifi or mobile cell internet, connect to mains, and have portable recording setup. Just add power.
+
+\section{RPI3 Install}
+Fundamentally flawed. First, when I plugged in the RPI, I forgot to plug in the HDMI to the monitor for the first minute. This means I was late, and the HDMI never showed up. This required a hard reboot of the RPI. Flaw 1.
+
+Flaw 2: The default password for most Ubuntu distributions is ubuntu with a blank password. In RPI3 image, it is ubuntu:ubuntu. However, this information is only on the RPI Ubuntu official guide. A readme file in the releases directory would've been better. With these two flaws 5-10 minutes of my life to stupid shit.
+
+\subsection{Steps}
+Remove restricted repos. Update the pi. To remove restricted, use a sed. sed 's/restricted//g' input > output. If you are lucky unattended upgrades won't start on you, otherwise you have to wait until it finishes.
+\begin{verbatim}
+Stop the automatic updater.
+
+sudo dpkg-reconfigure -plow unattended-upgrades
+
+\end{verbatim}
+I also required another reboot. Finally, I can update the system. 
+
+After all this, I realized that Debian 9 has in ZMRepo (but not in the official Debian repos) support for MP4 encoding. I'm moving to Debian.
+
+EDIT: However, getting an image for Debian 9 is not trivial. It's a bit crazy what they want you to do... Generate image using a script, etc.. Where's just an image? In fact, there's only an image for buster right now. Nope, just nope.
+
+Back to Ubuntu. This device can be obsolete in a year, I don't care. By then, I will have a new image with Debian 9 or 10. I could try the Devuan image which is pre-made, but I am not that bold (or foolish).
+
+\subsubsection{End of Life for 19.04}
+EOL is 9 months from release. Not bad. It came out two months ago. Then you can update to 19.10, and then to 20.04. I can live with this.
+
+
+
+
+
+
+
+
+\end{document}

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2019/Multiple_Switches_Can_Slow_A_Network/docs/2.tex

@@ -0,0 +1,41 @@
+\documentclass[11pt]{article}
+%Gummi|065|=)
+\title{\textbf{Multiple Switches can Slow a Network Down}}
+\author{Steak Electronics}
+\date{2019}
+\begin{document}
+
+%\maketitle
+\textbf{Multiple Switches can Slow a Network Down}
+\section{Overview}
+A question is, can multiple network switches, slow down either the network or the WAN. The answer is yes. Let's discuss a working example today.
+\section{The Previous IT Guys}
+Today I was working at an office. They had a firewall connected to a Verizon FIOS modem. They had a gigabit \footnote{Actually, all switches were gigabit, but it didn't make a difference.}switch immediately downstream, and then a network cable ran about 50-75 feet to their office. Here they had another Gigabit switch, and then the cables went off to either computers or other switches. Let's forget about what was downstream of that last switch except for the computers.
+
+\subsection{Internet Speeds}
+The internet speed from the two computers in the office was about 10Mbps down and roughly the same upload. However, I tested the speed directly from the IT closet, and found 100Mbps down and 100Mbps up. At this point, it was a simple case of following the signal path and seeing where things slowed down. At least, I knew that they \emph{should} be getting 100/100Mbps.
+
+\subsection{The Tests}
+What I found is that as soon as I had two switches after the firewall \footnote{which has its own internal switch}the speed would drop to 10/10. It was not dependent upon any brand of switch. I tried swapping from one other model that was available. The slowdown appeared to be switch independent. So in summary:
+\begin{itemize}
+\item Firewall - computer - 100/100
+\item Firewall - switch - computer - 100/100
+\item Firewall - switch - 50 foot wire - computer - 100/100
+\item Firewall - switch - 50 foot wire - Switch A- computer - 10/10
+\item Firewall - switch - 50 foot wire - Switch B- computer - 10/10
+  
+
+\end{itemize}
+What I did was remove the switch at the outside of the firewall. Now I had only \\
+\vspace{0.2in}
+\\
+Firewall - 50 foot wire - Switch - Computer - 100/100
+
+\section{Additional Background}
+I've heard an IT person mention that he didn't like multiple switches in network deployments, due to speed issues. On the other hand, I've setup Video Recording Networks with multiple switches all connecting serially to each other without issue. It seems that this is not a simple black and white issue. With the right hardware you may get away with it. Or if you avoid WAN access. In any case, the only way to know, is to test.
+
+\section{Conclusion}
+If you are going to put \textgreater 1 switches downstream of the firewall, make sure to double check the speed tests of WAN access. LAN access was no impacted in any significant way.
+
+
+\end{document}

2019/Multiple_Switches_Can_Slow_A_Network/docs/2.tex~

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+\documentclass[11pt]{article}
+%Gummi|065|=)
+\title{\textbf{Multiple Switches can Slow a Network Down}}
+\author{Steak Electronics}
+\date{2019}
+\begin{document}
+
+%\maketitle
+\textbf{Multiple Switches can Slow a Network Down}
+\section{Overview}
+A question is, can multiple network switches, slow down either the network or the WAN. The answer is yes. Let's discuss a working example today.
+\section{Work Log}
+
+
+
+
+
+\end{document}

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2019/Multiple_Switches_Can_Slow_A_Network/docs/3.tex

@@ -0,0 +1,45 @@
+\documentclass[11pt]{article}
+%Gummi|065|=)
+\usepackage{graphicx,caption}
+\title{\textbf{Multiple Switches can Slow a Network Down}}
+\author{Steak Electronics}
+\date{2019}
+\begin{document}
+
+%\maketitle
+\textbf{Multiple Switches can Slow a Network Down}
+\section{Overview}
+A question is, can multiple network switches, slow down either the network or the WAN. The answer is yes. Let's discuss a working example today.
+\section{The Previous IT Guys}
+Today I was working at an office. They had a firewall connected to a Verizon FIOS modem. They had a gigabit \footnote{Actually, all switches were gigabit, but it didn't make a difference.}switch immediately downstream, and then a network cable ran about 50-75 feet to their office. Here they had another Gigabit switch, and then the cables went off to either computers or other switches. Let's forget about what was downstream of that last switch except for the computers.
+
+\subsection{Internet Speeds}
+The internet speed from the two computers in the office was about 10Mbps down and roughly the same upload. However, I tested the speed directly from the IT closet, and found 100Mbps down and 100Mbps up. At this point, it was a simple case of following the signal path and seeing where things slowed down. At least, I knew that they \emph{should} be getting 100/100Mbps.
+
+\subsection{The Tests}
+What I found is that as soon as I had two switches after the firewall \footnote{which has its own internal switch}the speed would drop to 10/10. It was not dependent upon any brand of switch. I tried swapping from one other model that was available. The slowdown appeared to be switch independent. So in summary:
+\begin{itemize}
+\item Firewall - computer - 100/100
+\item Firewall - switch - computer - 100/100
+\item Firewall - switch - 50 foot wire - computer - 100/100
+\item Firewall - switch - 50 foot wire - Switch A- computer - 10/10
+\item Firewall - switch - 50 foot wire - Switch B- computer - 10/10
+  
+
+\end{itemize}
+What I did was remove the switch at the outside of the firewall. Now I had only \\
+\vspace{0.2in}
+\\
+Firewall - 50 foot wire - Switch - Computer - 100/100
+
+\includegraphics[scale=0.5]{../pics/drawing.png}
+\captionof{figure}{Here, removing the first switch after the firewall, resolved the low speed issues.}
+
+\section{Additional Background}
+I've heard an IT person mention that he didn't like multiple switches in network deployments, due to speed issues. On the other hand, I've setup Video Recording Networks with multiple switches all connecting serially to each other without issue. It seems that this is not a simple black and white issue. With the right hardware you may get away with it. Or if you avoid WAN access. In any case, the only way to know, is to test.
+
+\section{Conclusion}
+If you are going to put \textgreater 1 switches downstream of the firewall, make sure to double check the speed tests of WAN access. LAN access was no impacted in any significant way.
+
+
+\end{document}

2019/Multiple_Switches_Can_Slow_A_Network/docs/3.tex~

@@ -0,0 +1,41 @@
+\documentclass[11pt]{article}
+%Gummi|065|=)
+\title{\textbf{Multiple Switches can Slow a Network Down}}
+\author{Steak Electronics}
+\date{2019}
+\begin{document}
+
+%\maketitle
+\textbf{Multiple Switches can Slow a Network Down}
+\section{Overview}
+A question is, can multiple network switches, slow down either the network or the WAN. The answer is yes. Let's discuss a working example today.
+\section{The Previous IT Guys}
+Today I was working at an office. They had a firewall connected to a Verizon FIOS modem. They had a gigabit \footnote{Actually, all switches were gigabit, but it didn't make a difference.}switch immediately downstream, and then a network cable ran about 50-75 feet to their office. Here they had another Gigabit switch, and then the cables went off to either computers or other switches. Let's forget about what was downstream of that last switch except for the computers.
+
+\subsection{Internet Speeds}
+The internet speed from the two computers in the office was about 10Mbps down and roughly the same upload. However, I tested the speed directly from the IT closet, and found 100Mbps down and 100Mbps up. At this point, it was a simple case of following the signal path and seeing where things slowed down. At least, I knew that they \emph{should} be getting 100/100Mbps.
+
+\subsection{The Tests}
+What I found is that as soon as I had two switches after the firewall \footnote{which has its own internal switch}the speed would drop to 10/10. It was not dependent upon any brand of switch. I tried swapping from one other model that was available. The slowdown appeared to be switch independent. So in summary:
+\begin{itemize}
+\item Firewall - computer - 100/100
+\item Firewall - switch - computer - 100/100
+\item Firewall - switch - 50 foot wire - computer - 100/100
+\item Firewall - switch - 50 foot wire - Switch A- computer - 10/10
+\item Firewall - switch - 50 foot wire - Switch B- computer - 10/10
+  
+
+\end{itemize}
+What I did was remove the switch at the outside of the firewall. Now I had only \\
+\vspace{0.2in}
+\\
+Firewall - 50 foot wire - Switch - Computer - 100/100
+
+\section{Additional Background}
+I've heard an IT person mention that he didn't like multiple switches in network deployments, due to speed issues. On the other hand, I've setup Video Recording Networks with multiple switches all connecting serially to each other without issue. It seems that this is not a simple black and white issue. With the right hardware you may get away with it. Or if you avoid WAN access. In any case, the only way to know, is to test.
+
+\section{Conclusion}
+If you are going to put \textgreater 1 switches downstream of the firewall, make sure to double check the speed tests of WAN access. LAN access was no impacted in any significant way.
+
+
+\end{document}

2019/Multiple_Switches_Can_Slow_A_Network/docs/4.aux

@@ -0,0 +1,8 @@
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+\@writefile{toc}{\contentsline {section}{\numberline {1}Overview}{1}}
+\@writefile{toc}{\contentsline {section}{\numberline {2}The Previous IT Guys}{1}}
+\@writefile{toc}{\contentsline {subsection}{\numberline {2.1}Internet Speeds}{1}}
+\@writefile{toc}{\contentsline {subsection}{\numberline {2.2}The Tests}{1}}
+\@writefile{lof}{\contentsline {figure}{\numberline {1}{\ignorespaces Here, removing the first switch after the firewall, resolved the low speed issues.\relax }}{2}}
+\@writefile{toc}{\contentsline {section}{\numberline {3}Additional Background}{2}}
+\@writefile{toc}{\contentsline {section}{\numberline {4}Conclusion}{2}}

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2019/Multiple_Switches_Can_Slow_A_Network/docs/4.tex

@@ -0,0 +1,45 @@
+\documentclass[11pt]{article}
+%Gummi|065|=)
+\usepackage{graphicx,caption}
+\title{\textbf{Multiple Switches can Slow a Network Down}}
+\author{Steak Electronics}
+\date{2019}
+\begin{document}
+
+%\maketitle
+\textbf{Multiple Switches can Slow a Network Down}
+\section{Overview}
+A question is, can multiple network switches, slow down either the network or the WAN. The answer is yes. Let's discuss a working example today.
+\section{The Previous IT Guys}
+Today I was working at an office. They had a firewall connected to a Verizon FIOS modem. They had a gigabit \footnote{Actually, all switches were gigabit, but it didn't make a difference.}switch immediately downstream, and then a network cable ran about 50-75 feet to their office. Here they had another Gigabit switch, and then the cables went off to either computers or other switches. Let's forget about what was downstream of that last switch except for the computers.
+
+\subsection{Internet Speeds}
+The internet speed from the two computers in the office was about 10Mbps down and roughly the same upload. However, I tested the speed directly from the IT closet, and found 100Mbps down and 100Mbps up. At this point, it was a simple case of following the signal path and seeing where things slowed down. At least, I knew that they \emph{should} be getting 100/100Mbps.
+
+\subsection{The Tests}
+What I found is that as soon as I had two switches after the firewall \footnote{which has its own internal switch}the speed would drop to 10/10. It was not dependent upon any brand of switch. I tried swapping from one other model that was available. The slowdown appeared to be switch independent. So in summary:
+\begin{itemize}
+\item Firewall - computer - 100/100
+\item Firewall - switch - computer - 100/100
+\item Firewall - switch - 50 foot wire - computer - 100/100
+\item Firewall - switch - 50 foot wire - Switch A- computer - 10/10
+\item Firewall - switch - 50 foot wire - Switch B- computer - 10/10
+  
+
+\end{itemize}
+What I did was remove the switch at the outside of the firewall. Now I had only \\
+\vspace{0.2in}
+\\
+Firewall - 50 foot wire - Switch - Computer - 100/100
+
+\includegraphics[scale=0.5]{../pics/drawing.png}
+\captionof{figure}{Here, removing the first switch after the firewall, resolved the low speed issues.}
+
+\section{Additional Background}
+I've heard an IT person mention that he didn't like multiple switches in network deployments, due to speed issues. On the other hand, I've setup Video Recording Networks with multiple switches all connecting serially to each other without issue. It seems that this is not a simple black and white issue. With the right hardware you may get away with it. Or if you avoid WAN access. In any case, the only way to know, is to test.
+
+\section{Conclusion}
+If you are going to put \textgreater 1 switches downstream of the firewall, make sure to double check the WAN speed tests from just after the firewall, to at the very last switch.
+
+
+\end{document}

2019/Multiple_Switches_Can_Slow_A_Network/docs/4.tex~

@@ -0,0 +1,45 @@
+\documentclass[11pt]{article}
+%Gummi|065|=)
+\usepackage{graphicx,caption}
+\title{\textbf{Multiple Switches can Slow a Network Down}}
+\author{Steak Electronics}
+\date{2019}
+\begin{document}
+
+%\maketitle
+\textbf{Multiple Switches can Slow a Network Down}
+\section{Overview}
+A question is, can multiple network switches, slow down either the network or the WAN. The answer is yes. Let's discuss a working example today.
+\section{The Previous IT Guys}
+Today I was working at an office. They had a firewall connected to a Verizon FIOS modem. They had a gigabit \footnote{Actually, all switches were gigabit, but it didn't make a difference.}switch immediately downstream, and then a network cable ran about 50-75 feet to their office. Here they had another Gigabit switch, and then the cables went off to either computers or other switches. Let's forget about what was downstream of that last switch except for the computers.
+
+\subsection{Internet Speeds}
+The internet speed from the two computers in the office was about 10Mbps down and roughly the same upload. However, I tested the speed directly from the IT closet, and found 100Mbps down and 100Mbps up. At this point, it was a simple case of following the signal path and seeing where things slowed down. At least, I knew that they \emph{should} be getting 100/100Mbps.
+
+\subsection{The Tests}
+What I found is that as soon as I had two switches after the firewall \footnote{which has its own internal switch}the speed would drop to 10/10. It was not dependent upon any brand of switch. I tried swapping from one other model that was available. The slowdown appeared to be switch independent. So in summary:
+\begin{itemize}
+\item Firewall - computer - 100/100
+\item Firewall - switch - computer - 100/100
+\item Firewall - switch - 50 foot wire - computer - 100/100
+\item Firewall - switch - 50 foot wire - Switch A- computer - 10/10
+\item Firewall - switch - 50 foot wire - Switch B- computer - 10/10
+  
+
+\end{itemize}
+What I did was remove the switch at the outside of the firewall. Now I had only \\
+\vspace{0.2in}
+\\
+Firewall - 50 foot wire - Switch - Computer - 100/100
+
+\includegraphics[scale=0.5]{../pics/drawing.png}
+\captionof{figure}{Here, removing the first switch after the firewall, resolved the low speed issues.}
+
+\section{Additional Background}
+I've heard an IT person mention that he didn't like multiple switches in network deployments, due to speed issues. On the other hand, I've setup Video Recording Networks with multiple switches all connecting serially to each other without issue. It seems that this is not a simple black and white issue. With the right hardware you may get away with it. Or if you avoid WAN access. In any case, the only way to know, is to test.
+
+\section{Conclusion}
+If you are going to put \textgreater 1 switches downstream of the firewall, make sure to double check the speed tests of WAN access. LAN access was no impacted in any significant way.
+
+
+\end{document}

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2019/Multiple_Switches_Can_Slow_A_Network/docs/5.tex

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+\documentclass[11pt]{article}
+%Gummi|065|=)
+\usepackage{graphicx,caption}
+\title{\textbf{Multiple Switches can Slow a Network Down}}
+\author{Steak Electronics}
+\date{2019}
+\begin{document}
+
+%\maketitle
+\textbf{Multiple Switches can Slow a Network Down}
+\section{Overview}
+A question is, can multiple network switches, slow down either the network or the WAN. The answer is yes. Let's discuss a working example today.
+\section{The Previous IT Guys}
+Today I was working at an office. They had a firewall connected to a Verizon FIOS modem. They had a gigabit \footnote{Actually, all switches were gigabit, but it didn't make a difference.}switch immediately downstream, and then a network cable ran about 50-75 feet to their office. Here they had another Gigabit switch, and then the cables went off to either computers or other switches. Let's forget about what was downstream of that last switch except for the computers.
+
+\subsection{Internet Speeds}
+The internet speed from the two computers in the office was about 10Mbps down and roughly the same upload. However, I tested the speed directly from the IT closet, and found 100Mbps down and 100Mbps up. At this point, it was a simple case of following the signal path and seeing where things slowed down. At least, I knew that they \emph{should} be getting 100/100Mbps.
+
+\subsection{The Tests}
+What I found is that as soon as I had two switches after the firewall \footnote{which has its own internal switch}the speed would drop to 10/10. It was not dependent upon any brand of switch. I tried swapping from one other model that was available. The slowdown appeared to be switch independent. So in summary:
+\begin{itemize}
+\item Firewall - computer - 100/100
+\item Firewall - switch - computer - 100/100
+\item Firewall - switch - 50 foot wire - computer - 100/100
+\item Firewall - switch - 50 foot wire - Switch A- computer - 10/10
+\item Firewall - switch - 50 foot wire - Switch B- computer - 10/10
+  
+
+\end{itemize}
+What I did was remove the switch at the outside of the firewall. Now I had only \\
+\vspace{0.2in}
+\\
+Firewall - 50 foot wire - Switch - Computer - 100/100
+
+\includegraphics[scale=0.5]{../pics/drawing.png}
+\captionof{figure}{Here, removing the first switch after the firewall, resolved the low speed issues.}
+
+\section{Additional Background}
+I've heard an IT person mention that he didn't like multiple switches in network deployments, due to speed issues. On the other hand, I've setup Video Recording Networks with multiple switches all connecting serially to each other without issue. It seems that this is not a simple black and white issue. With the right hardware you may get away with it. Or if you avoid WAN access. In any case, the only way to know, is to test.
+
+\section{Conclusion}
+If you are going to put \textgreater 1 switches downstream of the firewall, make sure to double check the WAN speed tests from just after the firewall, to at the very last switch.
+
+
+\end{document}