Dell PowerConnect 6248 User's Guide - Page 29
Link Aggregation Features, IP Phone and Access Point Support Features - lacp
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Spanning Tree Root Guard Spanning Tree Root Guard is used to prevent the root of a Spanning Tree instance from changing unexpectedly. The priority of a Bridge ID can be set to zero but another Bridge ID with a lower mac address could also set its priority to zero and take over root. Bridge Protocol Data Unit Guard Spanning Tree BPDU Guard is used to disable the port in case a new device tries to enter the already existing topology of STP. Thus devices, which were originally not a part of STP, are not allowed to influence the STP topology. Link Aggregation Features Link Aggregation Up to eight ports can combine to form a single Link Aggregated Group (LAG). This enables fault tolerance protection from physical link disruption, higher bandwidth connections and improved bandwidth granularity. A LAG is composed of ports of the same speed, set to full-duplex operation. For information about configuring LAGs, see "LAG Configuration." Link Aggregation and LACP Link Aggregate Control Protocol (LACP) uses peer exchanges across links to determine, on an ongoing basis, the aggregation capability of various links, and continuously provides the maximum level of aggregation capability achievable between a given pair of systems. LACP automatically determines, configures, binds, and monitors the binding of ports to aggregators within the system. For information about LACP, see "LACP Parameters." IP Phone and Access Point Support Features Power Over Ethernet (PoE) Configuration The PowerConnect 6200 supports PoE configuration for power threshold, SNMP traps, and PoE legacy device support. Link Layer Discovery Protocol (LLDP) for Media Endpoint Devices The Link Layer Discovery Protocol for Media Endpoint Devices (LLDP-MED) provides an extension to the LLDP standard for network configuration and policy, device location, Power over Ethernet management, and inventory management. For information about configuring LLDP-MED, see "Configuring Link Layer Discovery Protocol (LLDP) for Media Endpoint Devices." Introduction 29