LAG State — Current STP state of a LAG. If enabled, the LAG state determines what forwarding action is taken on traffic. If the bridge discovers a malfunctioning LAG, the LAG is placed in the Broken state. Possible LAG states are:

Disabled — The LAG link is currently down.

Blocking — The LAG is blocked and cannot be used to forward traffic or learn MAC addresses.

Listening — The LAG is in the listening mode and cannot forward traffic or learn MAC addresses.

Learning — The LAG is in the learning mode and cannot forward traffic, but it can learn new MAC addresses.

Forwarding — The LAG is currently in the forwarding mode, and it can forward traffic and learn new MAC addresses.

Broken — The LAG is currently malfunctioning and cannot be used for forwarding traffic.

Role — Displays the port role assigned by the STP algorithm to provide to STP paths. The possible field values are:

Root — Provides the lowest cost path to forward packets to the root switch.

Designated — Indicates the port or LAG through which the designated switch is attached to the LAN.

Alternate — Provides an alternate path to the root switch from the root interface.

Backup — Provides a backup path to the designated port path toward the Spanning Tree leaves. Backup ports occur only when two ports are connected in a loop by a point-to-point link, or when a LAN has two or more connections connected to a shared segment.

Disabled — The port is not participating in the Spanning Tree.

Path Cost (1-200000000)— Amount the LAG contributes to the root path cost. The path cost is adjusted to a higher or lower value, and is used to forward traffic when a path being rerouted. The path cost has a value of 1 to 200000000. If the path cost method is short, the LAG cost default value is 4. If the path cost method is long, the LAG cost default value is 20000.

Default Path Cost — When selected, the LAG path cost returns to its default value.

Priority — The priority value of the LAG. The priority value influences the LAG choice when a bridge has two looped ports. The priority value is between 0-240, in increments of 16.

Designated Bridge ID — The bridge priority and the MAC Address of the designated bridge.

Designated Port ID — The port priority and interface number of the designated port.

Designated Cost — The cost of the designated bridge.

Forward Transitions — The number of times the LAG State has changed from the Blocking state to a Forwarding state.

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