Dell PowerConnect 6024 User's Guide (.htm) - Page 18
Private VLAN Edge, Spanning Tree Protocol Features, Spanning Tree Protocol (STP) per Device, Fast Link
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www.dell.com | support.dell.com Private VLAN Edge Private VLAN Edge (PVE) ports are a Layer 2 security feature that provides port-based security between adjacent ports within a VLAN. It is an extension of the common VLAN. Traffic from protected ports is sent only to the uplink ports and cannot be sent to other ports within the VLAN. For information about configuring PVE ports, see "Configuring Ports". Spanning Tree Protocol Features Spanning Tree Protocol (STP) per Device 802.1d STP is a standard requirement of Layer 2 switches that allows bridges to automatically prevent and resolve L2 forwarding loops. Switches exchange configuration messages, using specifically formatted frames, and selectively enable and disable forwarding on ports. For information about configuring STP, see "Configuring the Spanning Tree Protocol." Fast Link STP can take as long as 30-60 seconds to converge as it detects possible loops and allows time for status changes to propagate and for relevant devices to respond. This duration is considered too long for many applications. Fast Link bypasses this delay without requiring multiple data paths for network resiliency. For information about enabling Fast Link for ports and LAGs, see "Defining Port Configuration" or "Defining LAG Configuration." IEEE 802.1W Rapid Spanning Tree Rapid Spanning Tree Protocol (RSTP) detects uses network topologies to enable faster convergence, without creating forwarding loops. For information about enabling RSTP, see "Defining the Rapid Spanning Tree." Multiple Spanning Tree Multiple Spanning Tree (MSTP) operation maps VLANs into ST instances. MSTP provides a differing load balancing scenario. Packets assigned to various VLANs are transmitted along different paths within MSTP Regions (MST Regions). Regions are one or more interconnected MSTP bridges with identical MSTP settings. The standard lets administrators assign VLAN traffic to unique paths. For more information about MSTP, see "Defining the Multiple Spanning Tree". 28 Introduction
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