User’s Manual: SW-10200
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M
MAC Table
Switching of frames is based upon the DMAC address contained in the frame. The switch builds up a table that maps
MAC addresses to switch ports for knowing which ports the frames should go to (based upon the DMAC address in the
frame). This table contains both static and dynamic entries. The static entries are configured by the network administrator if
the administrator wants to do a fixed mapping between the DMAC address and switch ports.
The frames also contain a MAC address (SMAC address), which shows the MAC address of the equipment sending
the frame. The SMAC address is used by the switch to automatically update the MAC table with these dynamic MAC
addresses. Dynamic entries are removed from the MAC table if no frame with the corresponding SMAC address has been
seen after a configurable age time.
Mirroring
For debugging network problems or monitoring network traffic, the switch system can be configured to mirror frames
from multiple ports to a mirror port. (In this context, mirroring a frame is the same as copying the frame.)
Both incoming (source) and outgoing (destination) frames can be mirrored to the mirror port.
P
PD
PD is an acronym for Powered Device. In a PoE system the power is delivered from a PSE (power sourcing
equipment) to a remote device. The remote device is called a PD.
PING
ping is a program that sends a series of packets over a network or the Internet to a specific computer in order to
generate a response from that computer. The other computer responds with an acknowledgment that it received the
packets. Ping was created to verify whether a specific computer on a network or the Internet exists and is connected.
ping uses Internet Control Message Protocol (ICMP) packets. The PING Request is the packet from the origin
computer, and the PING Reply is the packet response from the target.
PoE
PoE is an acronym for Power Over Ethernet.
Power Over Ethernet is used to transmit electrical power, to remote devices over standard Ethernet cable. It could for
example be used for powering IP telephones, wireless LAN access points and other equipment, where it would be difficult or
expensive to connect the equipment to main power supply.
Policer
A policer can limit the bandwidth of received frames. It is located in front of the ingress queue.
Private VLAN
In a private VLAN, communication between ports in that private VLAN is not permitted. A VLAN can be configured as a
private VLAN.
Q
QCE
QCE is an acronym for QoS Control Entry. It describes QoS class associated with a particular QCE ID.
