The concepts behind Private VLANs are in fact rather simple, but it is quite easy to get discombobulated in the details. In their simplest form, PVLANs can dissociate ports within a PVLAN as if they were on separate VLANS, but still allow them to communicate with a common default gateway. i.e. these ports share a […]
Measuring Cable Lengths on a Catalyst Switch
A while back, I was playing on a 3750 switch in a customers lab and came across something I’ve never seen before. It seems that some Cisco switches have a built in Time-domain reflectometer, or TDR. While this is pretty standard on something like my Fluke gear, its nothing that I would expect to find […]
