Product guide

07020 021
Ethernet Switch
Ethernet Switch
www.micronet.info
Product specification is subject to change without prior notice.
Product Guide 2010
Link Aggregation
Link aggregation, or IEEE 802.3ad, is a
networking term which describes using
multiple Ethernet network cables/ports
in parallel to increase the link speed
beyond the limits of any one single cable
or port, and to increase the redundancy
for higher availability.
A limitation of link aggregation is that all
physical ports in the link aggregation
group must reside on the same switch.
QoS
Quality of Service is the ability to provide
different priority to different applications,
users, or data flows, or to guarantee a
certain level of performance to a data
flow. For example, a required bit rate,
delay, jitter, packet dropping probability
and/or bit error rate may be guaranteed.
Quality of service guarantees are
important if the network capacity is
insufficient, especially for real-time
streaming multimedia applications such
as Voice over IP, online games and IP-TV,
since these often require fixed bit rate and
are delay sensitive, and in networks
where the capacity is a limited resource,
for example in cellular data
communication.
Port Mirror
Port mirroring is used on a network switch
to send a copy of all network packets
seen on one switch port (or an entire
VLAN) to a network monitoring
connection on another switch port.
This is commonly used for network
appliances that require monitoring of
network traffic, such as an intrusion-
detection system.
Spanning Tree
The Spanning Tree Protocol (STP)is an
OSI layer-2 protocol that ensures a loop-
free topology for any bridged LAN.
Spanning tree allows a network design to
include spare (redundant) links to provide
automatic backup paths if an active link
fails, without the danger of bridge loops,
or the need for manual enabling/disabling
of these backup links. Bridge loops must
be avoided because they result in flooding
the network.
The Spanning Tree Protocol is defined in
the IEEE Standard 802.1D. It creates a
spanning tree within a mesh network of
connected layer-2 bridges (typically
Ethernet switches), and disables those
links that are not part of the tree, leaving a
single active path between any two
network nodes.
VLAN
A virtual LAN, commonly known as a
VLAN, is a group of hosts with a common
set of requirements that communicate as
if they were attached to the Broadcast
domain, regardless of their physical
location. A VLAN has the same attributes
as a physical LAN, but it allows the end
stations to be grouped together even if
they are not located on the same network
switch. Network reconfiguration can be
done through software instead of
physically relocating devices.
VLANs give you the ability to create
"virtual" switches inside a switch to help
decrease broadcast traffic and to increase
security.
Technical Notes