Kingston Technology Kingston Fast EtheRx KNS3250/R - Manual (Page 24)

KNS3250/R Users Guide - Rev. A00 Kingston Technology Company
Kingston Switch Configuration Utility 19
VLAN
This window allows users to dene VLAN membership by groups of device ports.
Any individual port or trunk can be a member of a VLAN group. A VLAN group is
basically a broadcast domain, but any port/trunk is not limited to belonging to only
one VLAN group. The forwarding rule is that packets from the source port/trunk
will only be forwarded to a destination port/trunk within the same VLAN group.
That is, a broadcast/multicast packet will be forwarded to all ports/trunks within
the same VLAN group(s) of the source port/trunk except the source port/trunk
itself. Unicast packets will be forwarded to the destination port/trunk only if the
destination port/trunk is in the same VLAN group as the source port/trunk.
Flood Control
Within a VLAN, the ood control function is provided to decide what to do with
incoming unicast packets with unknown destination MAC addresses.
Enable: Packets received with an unknown unicast destination address (DA)
will be forwarded to the specied out-link in the same VLAN group.
But if the source port (trunk) belongs to more than one VLAN
group, then the packet will only be forwarded to one of the out-
links.