Planet Technology SGSD-1022 User Manual

Page 164

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User’s Manual of SGSD-1022 / SGSD-1022P

SGSW-2840 / SGSW-2840P

164

- Discarding

Port receives STA configuration messages, but does not 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.

Forward Transitions

The number of times this port has transitioned from the Learning state to the

Forwarding state.

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 Bridge

The bridge priority and MAC address of the device through which this port must

communicate to reach the root of the Spanning Tree.

Designated Port

The port priority and number of the port on the designated bridging device

through which this switch must communicate with the root of the Spanning Tree.

Oper Path Cost

The contribution of this port to the path cost of paths towards the spanning tree

root which include this port.

Oper Link Type

The operational point-to-point status of the LAN segment attached to this

interface. This parameter is determined by manual configuration or by

auto-detection, as described for Admin Link Type in STA Port Configuration.

Oper Edge Port

This parameter is initialized to the setting for Admin Edge Port in STA Port

Configuration (i.e., true or false), but will be set to false if a BPDU is received,

indicating that another bridge is attached to this port.

Port Role

Roles are assigned according to whether the port is part of the active topology

connecting the bridge to the root bridge (i.e., root port), connecting a LAN

through the bridge to the root bridge (i.e., designated port), or is the MSTI

regional root (i.e., master port); or is an alternate or backup port that may

provide connectivity if other bridges, bridge ports, or LANs fail or are removed.

The role is set to disabled (i.e., disabled port) if a port has no role within the

spanning tree.

Trunk Member

Indicates if a port is a member of a trunk. (STA Port Information only)

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