Stackable NWay Ethernet Switch User’s GuideWeb-Based Network Management 109Advanced SettingsFigure 7-4. Advanced Switch Stack Features windowThe first setting allows you to enable or disable port auto-partitioning by the Auto-Partition Capability on AllPorts function. If you enable auto-partitioning on all ports, when more than 62 collisions occur while a port istransmitting data, the port automatically stops transmissions. The second setting allows you to enable ordisable the Head of Line (HOL) Blocking Prevention function, which is designed to prevent forwarding apacket to a “blocking” port. Click Apply to let your changes take effect.The information above is described as follows:♦ Port’s Auto-Partition Capability on All Ports This option offers Enabled or Disabled to decidewhether 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 portwhere an excess of packets are queued up. Note that when a multicast packet or a packet with anunknown 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.”
