10
it will also cause a 30 seconds delay 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 application.
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 could copy packets from some monitored port to another port for
network monitor. This switch also provides DA/SA filtering function for
monitoring the traffic to/from some user
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 two
priority level queues on each port. It could be configured for port-based or
802.1P tagged based. User can define the threshold (0 – 7) between high and
low priority queues. And user can also define the weight of traffic between the
high and low 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 5 minutes normally (it could be changed by
users.) If users want to keep a Mac address always in ARL table for 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 be used on the
assigned port only. For example, assigning “00-c0-f6-11-22-33” 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 Configuration” function for port security. 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 6.2 / 6.3 for the details of the Mac address filter-in operation of the
switch.
7.IEEE 802.1x Port Security Function
If the 802.1x function is enabled, the switch will act as an authenticator for
users accessing network through the switch. It will need a RADIUS server for
the authentication function. Users will be asked for username and password
before network access. If the RADIUS server authenticates it, the switch will