Proxy ARP (PARP)
Proxy ARP is an often overlooked IP service that can be really useful if applied correctly. Proxy ARP allows a routed interface to reply to ARP requests that it normally… Read more »
Tag: CCIE
Dynamic Trunking Protocol (DTP)
DTP is a means for switch ports to automatically form and negotiate trunks. Another feature that you don’t see used very often in large enterprise networks, but it still needs… Read more »
Private VLANs (PVLANs)
Private VLANs are another concept that is pretty easy to understand if you have a good understanding of how VLANs in general work. PVLANs are mostly used in larger multi-tenant… Read more »
VTP (VLAN trunking protocol)
This should be a quick one. If you are studying for your CCIE, you’ve likely heard of the horrors of VTP. I for one, haven’t ever worked anywhere that used… Read more »
Spanning Tree – MST (802.1s)
It should be obvious by now that there are really two types of spanning-tree topologies. One where all switches run a single spanning-tree instance (common spanning-tree) and one where a… Read more »
Spanning Tree – RSTP (802.1w)
802.1d has some downsides to it. Namely, it was slow to converge to a new topology taking anywhere from 30 to 50 seconds to do so. The main aim of… Read more »