Dell PowerConnect 3248 System User's Manual

Also see for PowerConnect 3248: Manual Features list Specification

ExampleConsole(config)#bridge 1 spanning-treeConsole(config)#bridge 1 forward-time 15Console(config)#bridge 1 hello-time 2Console(config)#bridge 1 max-age 20Console(config)#bridge 1 priority 40000Port SettingsIn the Port Settings page, you can specify Spanning Tree parameters for each port. For each port number listed in the Port column, the following informationis available:l Type — Specifies the type of port:¡ 100Base-TX — 10/100Base-TX RJ-45 port¡ 1000Base-TX — 10/100/1000Base-T RJ-45 port¡ 1000Base-SFP — gigabit SFP transceiver portl State — Displays the current state of the port within the Spanning Tree:¡ No Link — No valid link on the port.¡ Disabled — Port has been disabled by the user or has failed diagnostics.¡ Blocking — Port receives Spanning Tree configuration messages, but does not forward packets.¡ Listening — Port leaves blocking state due to topology change, starts transmitting configuration messages, but does not forward packets.¡ Learning — Port has transmitted configuration messages for an interval set by the Forward Delay parameter without receiving contradictoryinformation. The port address table is cleared, and the port begins learning addresses.¡ Forwarding — Port forwards packets and continues learning addresses.l Trunk — Indicates whether the port is configured as a trunk memberThe Port Settings page also contains the following editable fields:l Priority — Indicates the priority assigned to the port for the Spanning Tree Protocol (0 to 255). A port with a higher priority is less likely to be blocked ifthe Spanning Tree Protocol detects network loops. Low numeric value indicates a high priority.l Path Cost — Specifies the cost assigned to this port for the Spanning Tree Protocol (1 to 65535). A port with a lower cost is less likely to be blocked ifthe Spanning Tree Protocol detects network loops.l Fast Link — Immediately enables the port in forwarding state when a link comes up. The port is not part of the Spanning Tree at that time, but willparticipate in future Spanning Tree resolutions.CLI CommandsThe following table summarizes the equivalent CLI commands for items in the Spanning Tree/Port Settings page.bridge bridge-group max-age seconds Configures the spanning tree bridge maximum age globally for theswitch.bridge bridge-group priority priority Configures the spanning tree priority globally for the switch.show bridge group bridge-group[interface]Shows the spanning tree configuration.NOTE: Use Fast Link if a device is connected to a port that requires network access immediately when the link comes up and cannot wait for a SpanningTree resolution.Command Usage