D-Link DXS-3250E - xStack Switch, Руководство по установке в сети

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Appendix A, Device Specifications and Features
Page 387
Feature Description
Power over Ethernet Power over Ethernet (PoE) provides power to devices over exist-
ing LAN cabling, without updating or modifying the network infra-
structure. Power over Ethernet removes the necessity of placing
network devices next to power sources. Power over Ethernet can
be used in the following applications:
• IP Phones
• Wireless Access Points
• IP Gateways
• PDAs
• Audio and video remote monitoring
Private VLANs Private VLAN ports are a Layer 2 security feature which provides
isolation between ports within the same Broadcast domain.
QoS Statistics Support for two sets of counters that can count per Port/Queue/
DP. The counters count forwarded packets and Tail dropped
packets.
RADIUS Clients RADIUS is a client/server-based protocol. A RADIUS server
maintains a user database, which contains per-user
authentication information, such as user name, password and
accounting information.
RADIUS Accounting RADIUS Accounting enables to record device management
sessions (Telnet, serial and WEB but not SNMP) and or 802.1x
authentication sessions.
Rapid Spanning Tree Spanning Tree can take 30-60 seconds for each host to decide
whether its ports are actively forwarding traffic. Rapid Spanning
Tree (RSTP) detects uses of network topologies to enable faster
convergence, without creating forwarding loops.
Remote Monitoring Remote Monitoring (RMON) is an extension to SNMP, which pro-
vides comprehensive network traffic monitoring capabilities (as
opposed to SNMP which allows network device management and
monitoring). RMON is a standard MIB that defines current and
historical MAC-layer statistics and control objects, allowing real-
time information to be captured across the entire network.
Self-Learning MAC Addresses The device enables automatic MAC address learning from incom-
ing packets. The MAC addresses are stored in the Bridging Table
SNMP Alarms and Trap Logs The system logs events with severity codes and timestamps.
Events are sent as SNMP traps to a Trap Recipient List.
For more information on SNMP Alarms and Traps, see “Defining
SNMP Parameters.”