What's new

Performance impact

  • SNBForums Code of Conduct

    SNBForums is a community for everyone, no matter what their level of experience.

    Please be tolerant and patient of others, especially newcomers. We are all here to share and learn!

    The rules are simple: Be patient, be nice, be helpful or be gone!

W4RH34D

Regular Contributor
Howdy, I wanted to talk a little bit about smart switch features and what kind of performance impact some of these settings may or may not have. The impact could just be overhead, or from misconfiguration, I leave that part up to the discussion.

Recently, I've noticed that having port security, RSTP, ARP Spoofing prevention, bound mac+ip+ports seemed to make one of our lan apps slow down significantly under load, but doesn't rear issues when under moderate or light loads.

So this begs the question, how much of a hit are we taking from using these features?
 
Of course, it depends on the capabilities of the switch in use. A higher performing cpu and / or a better implementation of switch chips (or not, as the case may be) will all contribute to varying performance differences.
 
Of course, it depends on the capabilities of the switch in use. A higher performing cpu and / or a better implementation of switch chips (or not, as the case may be) will all contribute to varying performance differences.
You get what you pay for, I understand that. Yes, we're using a sub $500 switch for ~ 75 devices in this case.
 
You get what you pay for, I understand that. Yes, we're using a sub $500 switch for ~ 75 devices in this case.


Which one?
 
switches may say wirespeed but in the case the application uses smaller packets it will obviously overload the switch because of packet count. Certain features such as in a layer 3 switch is geared to detecting only commonly used protocols.
 
Well I went setting by setting, benchmarking the switch with fake work. Turns out half way through the settings I saw flowcontrol was disabled, which it shouldn't be by default. I couldn't slow down the switch after I turned that back on. I'll let ya'll know how a real world work load impacts the switch. So far the only thing I left off is RSTP, but I only have 2 switches connected together. I don't think I'll have any loopbacks in this topology.
 
I the real old days during hubs there was not any spanning tree support. You manually performed that function. Doing it small scale at your site should not cause a problem with 2 switches.
 
Been my experience on my network. Flow control being off caused a number of performance issues, especially between switches with LAG uplinks. With Flow control on, it works effectively wire speed across the switches.
 

Latest threads

Sign Up For SNBForums Daily Digest

Get an update of what's new every day delivered to your mailbox. Sign up here!
Top