Routing & Switching
Review: Errdisable port state
Those of you “new” to the Cisco world, or those who simply don’t have experience in the layer 2 world may not have heard of errdisable (or simply might refer to it as the proper term, error-disable)- but any seasoned tech knows what a pain it is to check your port and see errdisable. Back [...]
Frame Relay Traffic Shaping (FRTS)
While at a first glance, Frame Relay Traffic Shaping (or FRTS) seems daunting..it’s really not bad. For those of you unfamiliar with FRTS, I’ll present a couple of scenarios where you may need to configure it. High speed interface –> Low speed interface: Picture you have one node connecting to the frame relay cloud at [...]
The effects of Uplinkfast
Uplinkfast. How many of you can honestly say you’ve used it? Some of you? Most of you? Ok, well I guess I am the minority! I have seen spanning-tree uplinkfast used in configs, but never took the time to really understand the effects of it. The idea is simple enough. You have an access layer [...]
Command of the week: Switchport protected
I have done my share of work in the networking field, and had never heard of this command. I have also not been exposed to a wide variety of layer 2 technologies, but I must say, that this is a very cool command. Granted, it could be considered old- or not on par with private VLAN’s [...]
Unicasting RIP updates without the neighbor statement
While reading through my Cisco Press CCIE lab workbook, I came upon a section of the configs that kind of threw me off. The lab asked you to configure RIP to unicast updates without using the neighbor/passive-interface command. For those of you unfamiliar with the “neighbor” way of doing things, here’s how it goes. You [...]
