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aggregate several ports into one single group.
Additionally, it may be more cost-effective to trunk multiple lower
speed links than to underutilize a gigabit port. Available copper links
and supported distances are more pervasive for lower speed links.
For example, 100Mbps NICs and switch ports are less expensive
than 1Gbps equipment.
Port trunking also allows end users to protect their investment in
existing infrastructure by reusing current equipment.
SNMP
( Simple Network Management Protocol ) A widely-used network
monitoring and control protocol. Data is passed from SNMP agents,
which are hardware and/or software processes reporting activity in
each network device ( hub, router, bridge, etc. ) to the workstation
console used to oversee the network. The agents return information
contained in a MIB ( Management Information Base ), which is a
data structure that defines what is obtainable from the device and
what can be controlled ( turned off, on, etc.). Originating in the UNIX
community, SNMP has become widely used on all major platforms.
Port Mirror
Port mirror allows user to define a destination port and a target port ,
all the packet on the target port will be copy and resend to
destination port, it make user can monitor the packet and won’t
effect the bandwidth of target port.
IGMP
Internet Group Multicast Protocol (IGMP) is used to support
real-time applications such as video conferencing or streaming
audio. IGMP allow you to query for any attached hosts who want to
receive a specific multicast service. The switch looks up the IP
Multicast Group used for this service and adds any port which
