Linksys SRW2024P User Manual page 73

24-Port 10/100/1000 Gigabit Switch with Webview and PoE
Click Detail to configure Path Cost, Priority, Administrative Edge Port (Fast Forwarding), and Administrative Link
Type. Use the text fields provided to edit the values, then click Apply.
Designated Cost. The cost for a packet to travel from this port to the root in the current Spanning Tree
configuration. The slower the media, the higher the cost.
Designated Port. The port priority and number of the port on the designated port.
Designated Bridge. The bridge priority and MAC address of the device through which this port must
communicate to reach the root of the Spanning Tree.
Path Cost. This parameter is used by the STP to determine the best path between devices. Therefore, lower
values should be assigned to ports attached to faster media, and higher values assigned to ports with slower
media. (Path cost takes precedence over port priority.) Note that when the Path Cost Method is set to "short," the
maximum path cost is 65,535.
• Range –Ethernet: 200,000-20,000,000
Fast Ethernet: 20,000-2,000,000
Gigabit Ethernet: 2,000-200,000
• Default –Ethernet – Half duplex: 2,000,000; full duplex: 1,000,000; LAG: 500,000
Fast Ethernet – Half duplex: 200,000; full duplex: 100,000; LAG: 50,000
Gigabit Ethernet – Full duplex: 10,000; LAG: 5,000
Priority. Defines the priority used for this port in the Spanning Tree Protocol. If the path cost for all ports on a
switch are the same, the port with the highest priority (i.e., lowest value) will be configured as an active link in the
Spanning Tree. This makes a port with higher priority less likely to be blocked if the Spanning Tree Protocol is
detecting network loops. Where more than one port is assigned the highest priority, the port with lowest numeric
identifier will be enabled.
• Default: 128
• Range: 0-240, in steps of 16
Administrative Edge Port (Fast Forwarding). You can enable this option if an interface is attached to a LAN
segment that is at the end of a bridged LAN or to an end node. Since end nodes cannot cause forwarding loops,
they can pass directly through to the spanning tree forwarding state. Specifying Edge Ports provides quicker
convergence for devices such as workstations or servers, retains the current forwarding database to reduce the
amount of frame flooding required to rebuild address tables during reconfiguration events, does not cause the
spanning tree to initiate reconfiguration when the interface changes state, and also overcomes other STA-related
Chapter 5: Using the Web-based Utility for Configuration
Spanning Tree Tab - STP Port Settings
64