3Com 3CBLSG48 User Manual page 202

Table 11 Features of the Baseline Switch 2948-SFP Plus
Feature
Port-based Virtual lAns
RADIUS Clients
Rapid Spanning Tree
Remote Monitoring
Self-learning MAC Addresses
SnMP Alarms and Trap logs
SnMP Versions 1 and 2
Spanning Tree Protocol
SSl
Static MAC Entries
Description
Port-based VlAns classify incoming packets to VlAns based on their ingress
port. Port Mirroring 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.
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.
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 (RMOn) is an extension to SnMP, which provides
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.
The device enables automatic MAC address learning from incoming packets.
The MAC addresses are stored in the Bridging Table.
The system logs events with severity codes and timestamps. Events are sent
as SnMP traps to a Trap Recipient list.
Simple network Management Protocol (SnMP) over the UDP/IP protocol
controls access to the system.
802.1d Spanning tree is a standard layer 2 switch requirement 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.
Secure Socket layer (SSl) is an application-level protocol that enables secure
transactions of data through privacy, authentication, and data integrity. It
relies upon certificates and public and private keys.
MAC entries can be manually entered in the Bridging Table, as an alternative
to learning them from incoming frames. These user defined entries are not
subject to aging, and are preserved across resets and reboots.
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