CCIE Routing and Switching FAQ: Spanning Tree Protocol Q1. Assume that a nonroot 802.1D switch has ceased to receive Hello BPDUs. Which STP setting determines how long a nonroot switch waits before trying to choose a new Root Port? A. Hello timer setting on the Root B. MaxAge timer setting on the Root C. ForwardDelay timer setting on the Root D. Hello timer setting on the … [Read more...]
CCNA FAQ: Spanning Tree Protocol
CCNA FAQ: Spanning Tree Protocol Q1. Which of the following IEEE 802.1d port states are stable states used when STP has completed convergence? (Choose two answers.) a. Blocking b. Forwarding c. Listening d. Learning e. Discarding Answer: A and B. Listening and Learning are transitory port states, used only when moving from the Blocking to the Forwarding State. Discarding … [Read more...]
Spanning Tree Protocol
Spanning Tree Protocol Once a proprietary protocol from DEC, Spanning Tree Protocol (STP) was standardized and blessed by the IEEE specification, 802.1d. STP allows networks to maintain a level of redundancy while disabling the detrimental side effects that can occur such as broadcast storms. Enabled by default on most switches, STP forms noncircular (no looping) paths … [Read more...]
ESWD_STP_BASE_MAC_ERROR
This condition is generated by the Ethernet bridging process (eswd) when STP (Spanning Tree Protocol) cannot derive the base MAC (Media Access Control) address of the system. The ESWD_STP_BASE_MAC_ERROR message is logged each time the Ethernet bridging process STP functionality failed to derive the base MAC address of the system. When a ESWD_STP_BASE_MAC_ERROR event … [Read more...]