D-Link DGS-3620-28TC-SI Product Manual - Page 101
STP Port Settings, L2 Features > Spanning Tree > STP Port Settings, From Port / To Port
View all D-Link DGS-3620-28TC-SI manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 101 highlights
xStack® DGS-3620 Series Managed Switch Web UI Reference Guide NOTE: The Bridge Hello Time cannot be longer than the Bridge Max Age. Otherwise, a configuration error will occur. Observe the following formulas when setting the above parameters: Bridge Max Age 2 x (Bridge Hello Time + 1 second) STP Port Settings STP can be set up on a port per port basis. To view the following window, click L2 Features > Spanning Tree > STP Port Settings, as show below: Figure 4-37 STP Port Settings window It is advisable to define an STP Group to correspond to a VLAN group of ports. The fields that can be configured are described below: Parameter Description Unit From Port / To Port External Cost (0 = Auto) P2P Select the unit you want to configure. Select the starting and ending ports to be configured. 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). 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. The default port cost for a 100Mbps port is 200000 and the default port cost for a Gigabit port is 20000. Enter a value between 1 and 200000000 to determine the External Cost. The lower the number, the greater the probability the port will be chosen to forward packets. Choosing the True parameter indicates a point-to-point (P2P) shared link. P2P ports are similar to edge ports; however they are restricted in that a P2P port must operate in full duplex. Like edge ports, P2P ports transition to a forwarding state rapidly thus benefiting from RSTP. A P2P value of False indicates that the port cannot have P2P status. Auto allows the port to have P2P status whenever possible and operate as if the P2P status were True. If the port cannot maintain this status, (for example if the port is forced to half-duplex operation) the P2P status changes to operate as if the 91