spanning-tree Archives

CCNA 2.6.a: STP mode (PVST+ and RPVST+)

Posted on June 20, 2018August 31, 2019 by Joe Barger (CCNP/CCDP)

Overview: Per-VLAN Spanning-Tree plus and Rapid PVST+ are enhancements to 802.1D STP Study Notes: 802.1D Spanning Tree Protocol (STP) has a drawback of slow convergence Cisco Catalyst switches support three types of STPs, which are PVST+, rapid-PVST+ and MST. Per-VLAN Spanning-Tree plus (PVST+) PVST+ is based on IEEE802.1D standard and includes Cisco proprietary extensions such […]

CCNA 2.6: Configure, verify, and troubleshoot STP protocols

Posted on June 20, 2018December 2, 2018 by Joe Barger (CCNP/CCDP)

Overview: Spanning-Tree Protocol prevents loops in a network Problems that Spanning-Tree Protocol fixes: Switches are interconnected with redundant links for resiliency, but that caused loops and broadcast storms Connecting switches like this also caused inconsistent MAC address tables because the switch would see the same host MAC address on two different ports If the switch […]