
Explanation:
End-host mode features include:
- Spanning Tree Protocol is not run on both the uplink ports and the server ports.
- MAC address learning occurs only on the server ports; MAC address movement is fully supported.
- Links are active-active regardless of the number of uplink switches.
- The system is highly scalable because the control plane is not occupied.
Ethernet switching mode features include:
- Spanning Tree Protocol is run on the uplink ports per VLAN as defined by Cisco Per-VLAN Spanning Tree Plus (PVST+)
- Configuration of Spanning Tree Protocol parameters (bridge priority, hello timers, etc.) is not supported.
- VLAN Trunk Protocol (VTP) is not supported.
- MAC address learning and aging occur on both the server and uplink ports as in a typical Layer
2 switch.
- Upstream links are blocked according to Spanning Tree Protocol rules.