SMC Networks SMC7724M/VSW manual Managing Interface Settings, Fields and Attributes

SPANNING TREE PROTOCOL CONFIGURATION

Managing Interface Settings

You can configure STA attributes for specific interfaces, including port priority, path cost, and fast forwarding. Use a different priority or path cost for ports of the same media type to indicate the preferred path.

Fields and Attributes

•STA State – Displays the current state of this port within the Spanning Tree:

•Disabled - No link has been established on this port. Otherwise, the port has been disabled by the user or has failed diagnostics.

•Blocking - Port receives STA configuration messages, but does not forward packets.

•Listening - Port will leave blocking state due to a topology change, start transmitting configuration messages, but will not yet forward packets.

•Learning - Port has transmitted configuration messages for an interval set by the Forward Delay parameter without receiving contradictory information. Port address table is cleared, and the port begins learning addresses.

•Forwarding - Port forwards packets, and continues learning addresses.

•Broken - Port is malfunctioning or no link has been established.

•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 - 255

2-41