CTC Union GSW-3208M1, User Manual

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automatically. But it will also cause a period of delay (30 seconds for STP
and shorter time for RSTP) if any network connection is changed because of
the network topology detection operation of the protocol.
Because there could be more than one switch in the network, users can
configure this function for their network spanning tree applicatio n.
4. Port Mirror
This switch operates in store-and-forward algorithm so it is not possible to
monitor network traffic from another connection port. But the port mirror
function can copy packets from some monitored port to another port for
network monitor.
5. QoS
For Quality of Service request in a network, packets could be classified to
different forwarding priorities. For real -time network traffic (like video,
audio), it needs higher priority than normal network traffic. With the
definition of packet priority, it could have 8 priority levels (from 0 to 7). This
switch supports eight priority level queues on each port. It could be
configured for port-based, 802.1P tagged based, or DiffServ of IP packets
priority. User can define the mapping of priority values to the priority
queues.
6. Static Mac ID in ARL table
The switch can learn the Mac address from user’s packets and keep these
Mac address in the ARL table for store -and-forward table lookup operation.
But these Mac addresses will be deleted from ARL table after some time
when users do not send any packets to the switch. This operation is called
aging and the time is called aging time. It is about 5 minutes normally (it
could be changed by users.) If users want to keep a Mac address always in
ARL table on some port, they can assign the Mac address to ARL table.
These Mac ID are called Static Mac address. This switch supports static
Mac address assignment.
The static Mac address assignment will also limit
the Mac address could b e used on the assigned port only with the port security
configuration function.
For example, assigning “00-00-e2-11-22-33” to Port 5
will always keep this Mac ID alive on Port 5 but also limit this Mac address
could work on Port 5 only.
Note: About Static Mac Address Filter-in (port binding) function
There is a Mac Security function for port security. If Mac Table Learning is
set to “Secure”, only these static Mac addresses can access network through
the assigned port. The other Mac addresses will be forbidden for network
access through that port. This function can be used for port binding security
application. Please refer to Section 6.3 for the details of the Mac address
filter-in operation of the switch.