D-Link DES-3225G - Manual (Page 113)

24-port NWay Ethernet Switch User’s Guide
Web-Based Network Management 103
The first setting allows you to enable or disable port auto-partitioning by the Port Auto-Partition Capability on
All ports function. If you enable auto-partitioning on all ports, when more than 63 collisions occur while a port is
transmitting data, the port automatically stops transmissions. The second setting allows you to enable or disable the
Head of Line (HOL) Blocking Prevention function, which is designed to prevent forwarding a packet to a “blocking”
port. Click Apply to let your changes take effect.
The information in the window is described as follows:
♦ Port Auto-Partition Capability on All ports This option offers Enabled or Disabled to decide whether
to auto-partition a selected port and take it offline or not.
♦ Head of Line (HOL) Blocking Prevention This option prevents forwarding a packet to a port where an
excess of packets are queued up. Note that when a multicast packet or a packet with an unknown destination
address needs to be forwarded to several ports, and if some of them are “blocking,” the packet will not be
discarded, rather it will be forwarded only to the ports that are not “blocking.”
Filtering and Forwarding Table
When a packet hits the Switch, it looks in the filtering and forwarding table to decide what to do with the packet; either to
filter it off the network, or to forward it through the port on which its destination lies.
Configure
Figure 7-6. Configure window