D-Link DES-3624 - Manual (Page 57)

Stackable NWay Ethernet Switch User’s Guide
Using the Console Interface 57
such as video or audio data, where latency can produce distorted sounds and images. Packets in the low
priority queue will not be processed unless the High priority queue is empty. Setting the port priority to
High will deliver all packets arriving at the port to the high priority queue, a Low setting will send
them all to the low priority queue. The Normal setting causes the port to examine the packet for an
IEEE 802.1p/q priority tag. If no tag exists, the packet will be sent to the low priority queue. If the
priority tag field in the packet header contains a value of 0-3, the packet will be placed in the low
priority queue; a value of 4-7 causes the packet to be placed in the high priority queue.
♦ Port Lock When Enabled, automatic learning for all stations connected to this port will stop and
entries in the Forwarding Table for all devices residing on this port will age out. The only traffic this
port will allow is traffic from machines whose MAC address is manually entered in the Static
Forwarding Table.
♦ Broadcast Storm Rising Action This setting will be activated when a Broadcast Storm Rising
Threshold is met. When triggered, the port can be configured to Do Nothing, Blocking or Blocking-Trap.
The Do Nothing setting causes the switch to operate normally, in other words, ignore the broadcast
storm condition. The Blocking setting causes the port to drop all broadcast frames, thus isolating the
broadcast storm. Blocking-Trap performs the same action as Blocking, except it also sends a trap to the
designated Trap Recipient informing them of the situation. For more information on broadcast storms,
please refer to the previous chapter.
♦ Broadcast Storm Falling Action This setting will be activated when the Broadcast Storm Rising
Threshold and then the Broadcast Storm Falling Threshold are each met. This setting can be configured
to Do Nothing, Forwarding or Forwarding-Trap. The Do Nothing setting causes the switch to operate
normally, that is, to ignore the situation. If the port had met the Broadcast Storm Rising Action criteria
and started Blocking broadcast packets, it will continue doing so. The Forwarding setting causes the
port to begin forwarding broadcast frames, thus removing the Blocking state imposed by the Broadcast
Storm Rising Action. Forwarding-Trap performs the same action as Forwarding, except it also sends a
trap to the designated Trap Recipient informing them of the situation.
Press CTRL+S to let the changes take effect. If you wish these changes to be the default for the switch,
return to the main menu and choose Save Changes.
STP Port State (whether the Spanning Tree Protocol is enabled or disabled on this port) and Status reflect
the current conditions of the port. They are read-only fields and cannot be changed.
Configure Trunk
Ports on the Switch can be grouped together in a single logical port called a trunk. This is discussed in detail
in the Port Trunking section of the “Switch Management Concepts” chapter of this manual.
To set up a trunk group, choose Configure Trunk on the System Configuration menu. The following
screen appears: