3Com 3CDSG10PWR User Guide - Page 218

218 APPENDIX B: DEVICE SPECIFICATIONS AND FEATURES Table 9 Features of the OfficeConnect Managed Gigabit PoE Switch (continued) Feature LACP Link Aggregated Groups MAC Address Capacity Support MAC Multicast Support MDI/MDIX Support Password Management Port-based Authentication Port-based Virtual LANs Port Mirroring Description 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 port binding within the system. The system provides up to four Link Aggregated Groups (LAGs). Aggregated Links may be defined, each with up to eight member ports, to form a single LAG. LAGs provide: ■ Fault tolerance protection from physical link disruption ■ Higher bandwidth connections ■ Improved bandwidth granularity ■ High bandwidth server connectivity ■ LAG is composed of ports with the same speed, set to full-duplex operation. The device supports up to 8K MAC addresses. The device reserves specific MAC addresses for system use. Multicast service is a limited broadcast service, which allows one-to-many and many-to-many connections for information distribution. Layer 2 Multicast service is where a single frame is addressed to a specific Multicast address, from where copies of the frame are transmitted to the relevant ports. The device automatically detects whether the cable connected to an RJ-45 port is crossed or straight through, when auto-negotiation is enabled. Standard wiring for end stations is Media-Dependent Interface (MDI) and the standard wiring for hubs and switches is known as Media-Dependent Interface with Crossover (MDIX). Password management provides increased network security and improved password control. Passwords for HTTP, HTTPS, and SNMP access are assigned security features. For more information on Password Management, see "Default Users and Passwords" page 29. Port-based authentication enables authenticating system users on a per-port basis via an external server. Only authenticated and approved system users can transmit and receive data. Ports are authenticated via the Remote Authentication Dial In User Service (RADIUS) server using the Extensible Authentication Protocol (EAP). Port-based VLANs classify incoming packets to VLANs based on their ingress port. Port mirroring monitors and mirrors network traffic by forwarding copies of incoming and outgoing packets from a monitored port to a monitoring port. Users specify which target port receives copies of all traffic passing through a specified source port.