Cisco STP (Spanning Tree) Configuration ! | Free CCNA 200-301 | www.ipcisco.com . #network#networking#cisco#ccna#cisconetworking#ciscocertification#networkengineer#packettracer#spanningtree#ciscoccna . In Layer 2 domain, redundancy is an important case. To provide redundant links, multiple connections are done between switches. But this redundancy mechanism can cause an undesirable situation that is called “L2 Loop”. To provide L2 redundancy and to avoid L2 loops, Spanning Tree Protocol (STP) ha