SPAN, RSPAN, Layer 2 control packets and VLANS
I know the title is quite a mouthful, but I did want to cover all the above in this post. Daniel asked me to check a few things as I have ready access to real switches. You learn in your studies that layer 2 control packets are ‘special’ – Special in the way that traffic going over the trunk between 2 switches does not follow the standard practice. Let’s use wireshark to see exactly what is going on in a bunch of scenarios. It’ll also give me the opportunity to do a bit of testing with SPAN and RSPAN. ...