CCIE

A single misbehaving host can take down an entire VLAN. It does not take a spanning tree loop - a NIC

Spanning tree has one blind spot, and it is a dangerous one. STP decides whether to block a port based

Two switching standards, both trying to prevent loops, neither aware the other exists. That is what an MST-to-PVST+

Sooner or later somebody decides the network is moving from EIGRP to OSPF. Maybe a merger brought in a multi-

Redistribution between two routing protocols at a single point is easy. Redistribution between two routing protocols at two points is

EIGRP over DMVPN works beautifully, right up until the moment you realise none of your spokes can reach any of