3Com 3CRDSF9PWR manual Switch Features

Switch Features 231

Table 13 Features of the OfficeConnect Managed Fast Ethernet PoE Switch (continued)

Feature	Description
Configuration File Management	The device configuration is stored in a configuration file. The
	Configuration file includes both system wide and port specific device
	configuration settings. The system can display configuration files in the
	form of a collection of CLI commands, which are stored and manipulated
	as text files.
DHCP Clients	Dynamic Host Client Protocol. DHCP enables additional setup parameters
	to be received from a network server upon system startup. DHCP service
	is an on-going process.
Domain Name System	Domain Name System (DNS) converts user-defined domain names into IP
	addresses. Each time a domain name is assigned, the DNS service
	translates the name into a numeric IP address. For example,
	www.ipexample.com is translated to 192.87.56.2. DNS servers maintain
	domain name databases and their corresponding IP addresses.
Edge Port	STP can take up to 30-60 seconds to converge. During this time, STP
	detects possible loops, allowing time for status changes to propagate and
	for relevant devices to respond. 30-60 seconds is considered too long of a
	response time for many applications. The Edge Port option bypasses this
	delay, and can be used in network topologies where forwarding loops do
	not occur.
Full 802.1Q VLAN Tagging Compliance	IEEE 802.1Q defines an architecture for virtual bridged LANs, the services
	provided in VLANs, and the protocols and algorithms involved in the
	provision of these services. An important requirement included in this
	standard is the ability to mark frames with a desired Class of Service (CoS)
	tag value.
IGMP Snooping	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.
LACP	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.
Link Aggregated Groups	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.