3Com 3CBLSG48 User Guide - Page 201

190 appendix B: DEVICE SPECIFICATION AND FEATURES Table 11 Features of the Baseline Switch 2948-SFP Plus Feature IGMP Snooping Description IGMP Snooping examines IGMP frame contents, when they are forwarded by the device from work stations to an upstream Multicast router. From the frame, the device identifies work stations configured for Multicast sessions, and which Multicast routers are sending Multicast frames. Link Aggregated Groups Link Aggregated Group (LAG). The system provides up-to eight Aggregated Links to 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. MAC Address Capacity Support The device supports up to 8K MAC addresses. The device reserves specific MAC addresses for system use. MAC Multicast Support 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. MDI/MDIX Support 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 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". Port-based Port-based authentication enables authenticating system users on a Authentication 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).