Serial and USB Console on Mac OSX

Obviously nowadays when admining we mostly have laptops - laptops don’t tend to come with serial I/O ports anymore, so you buy a Serial -> USB adapter, say this one ↗ or any one with a legit (there are fakes) FDTI FT232RL chipset. Download and install the relevant drivers but where do we go from here? Specifically on mac, find your device’s tty name: cd /dev ls -ltr *usb* I added a handy little alias to my...

September 11, 2013 · Myles Gray

How to test if 9000 MTU/Jumbo Frames are working

Introduction Fairly straight forward this time, you’ve configured your MTU/jumbo frames to be 9000 on your client and destination devices (say a laptop/desktop/server/san/nas) and on ALL your switching devices in between - you’ve done that right? ;) Testing So the next step is, we want to test if our new 9000 byte MTU is actually working and we can reap the benefits of a larger packet size (whether it’s on iSCSI, LAN, whatever) being of course a higher latency but also higher throughput....

September 9, 2013 · Myles Gray