D-Link DES-3028 Product Manual - Page 137
STP Port Settings, L2 Features > Spanning Tree > STP, Port Priority, Port Cost
UPC - 790069305375
View all D-Link DES-3028 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 137 highlights
DES-3028 DES-3028P DES-3028G DES-3052 DES-3052P Layer 2 Fast Ethernet Managed Switch STP Port Settings STP can be set up on a port per port basis. To view the STP Port Settings window click L2 Features > Spanning Tree > STP Port Settings: Figure 7- 37. STP Port Settings window In addition to setting Spanning Tree parameters for use on the switch level, the Switch allows for the configuration of groups of ports, each port-group of which will have its own spanning tree, and will require some of its own configuration settings. An STP Group will use the switch-level parameters entered above, with the addition of Port Priority and Port Cost. An STP Group spanning tree works in the same way as the switch-level spanning tree, but the root bridge concept is replaced with a root port concept. A root port is a port of the group that is elected based on port priority and port cost, to be the connection to the network for the group. Redundant links will be blocked, just as redundant links are blocked on the switch level. The STP on the switch level blocks redundant links between switches (and similar network devices). The port level STP will block redundant links within an STP Group. It is advisable to define an STP Group to correspond to a VLAN group of ports. The following fields can be set: Parameter Description From/To A consecutive group of ports may be configured starting with the selected port. State Toggle from Disabled to Enabled to implement BPDU packet forwarding. Cost (0 = Auto) External Cost - This defines a metric that indicates the relative cost of forwarding packets to the specified port list. Port cost can be set automatically or as a metric value. The default value is 0 (auto). 0 (auto) - Setting 0 for the external cost will automatically set the speed for forwarding packets to the specified port(s) in the list for optimal efficiency. Default port cost: 100Mbps port = 200000. Gigabit port = 20000. value 1-200000000 - Define a value between 1 and 200000000 to determine the external cost. The lower the number, the greater the probability the port 123