3Com 2924-SFP User Manual page 186

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PPENDIX EVICE
Table 11 Features of the Baseline Switch 2916-SFP Plus and Switch 2924-SFP Plus (continued)
Feature
Address Resolution Protocol (ARP)
Class Of Service (CoS)
Command Line Interface
Configuration File Management
DHCP Clients
Fast Link
Full 802.1Q VLAN Tagging Compliance
IGMP Snooping
Link Aggregated Groups
S F
PECIFICATIONS AND EATURES
Description
ARP converts between IP addresses and MAC (i.e., hardware) addresses.
ARP is used to locate the MAC address corresponding to a given IP
address. This allows the switch to use IP addresses for routing decisions
and the corresponding MAC addresses to forward packets from one hop
to the next.
Provide traffic belonging to a group preferential service (in terms of
allocation of system resources), possibly at the expense of other traffic.
The Command Line Interface (CLI) is an interface using a serial connection
that allows basic features to be configured, including IP address
management and firmware upgrading. The CLI is not intended as the
main interface for the switch.
The device configuration is stored in a configuration file. The
Configuration file includes both system wide and port specific device
configuration. The system can display configuration files in the form of a
collection of CLI commands, which are stored and manipulated as text
files.
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.
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 Fast Link option bypasses this
delay, and can be used in network topologies where forwarding loops do
not occur.
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 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 Group (LAG). The system provides up-to eight
Aggregated Links may be defined, each with up to eight member ports,
to form a single. LAGs provide:
Fault tolerance protection from physical link disruption
■
Higher bandwidth connections
■
Improved bandwidth granularity
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High bandwidth server connectivity
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LAG is composed of ports with the same speed, set to full-duplex
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operation.