Item

 

Description

 

 

 

Indicates if the interface is acting as the root port of the switch. The possible

 

Root Guard

 

field values are:

 

 

z Enabled: Indicates Root Guard is enabled on the port

 

 

 

 

 

 

z Disabled: Indicates Root Guard is disabled on the port.

 

 

 

 

 

 

 

Displays the current STP state of a port. If enabled, the port state determines

 

 

 

what action is taken on traffic. Possible port states are:

 

 

 

z Disable: Indicates that STP is currently disabled on the port. The port

 

 

 

forwards traffic while learning MAC addresses.

 

 

 

z Blocking: Indicates that the port is currently blocked and cannot forward

 

 

 

traffic or learn MAC addresses. Blocking is displayed when Classic STP

 

Port State

 

is enabled.

 

 

z Listening: Indicates that the port is in listening mode. The port cannot

 

 

 

forward traffic nor can it learn MAC addresses.

 

 

 

z Learning: Indicates that the port is in learning mode. The port cannot

 

 

 

forward traffic, however it can learn new MAC addresses.

 

 

 

z Forwarding: Indicates that the port is in forwarding mode. The port can

 

 

 

forward traffic and learn new MAC addresses.

 

 

 

z Discarding: Indicates that the port is in discarding mode. The port is

 

 

 

listening to BPDUs, and discards any other frames it receives.

 

 

 

Displays the port role assigned by the STP algorithm to provide to STP

 

 

 

paths. The possible field values are:

 

 

 

z Disable: Indicates that the port or LAG is currently disabled on the port

 

 

 

z Designated: The port or LAG through which the designated switch is

 

Port Role

 

attached to the LAN.

 

 

z Alternate: Provides an alternate path to the root switch from the root

 

 

 

interface.

 

 

 

z Backup: With the designated port being blocked, the backup port

 

 

 

becomes the new designated port fast and begins to forward data

 

 

 

seamlessly.

 

 

 

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

 

Speed

 

Indicates the speed at which the port is operating.

 

 

 

 

 

 

 

Indicates the port contribution to the root path cost. The path cost is adjusted

 

Path Cost

 

to a higher or lower value, and is used to forward traffic when a path is

 

 

 

re-routed.

 

 

 

 

 

 

 

Indicates the priority value of the port. The priority value influences the port

 

Priority

 

choice when a bridge has two ports connected in a loop. The priority range is

 

 

 

between 0-240.

 

 

 

 

 

 

 

Indicates whether a Point-to-Point link is established, or if the switch is

 

 

 

permitted to establish a Point-to-Point link. The possible field values are:

 

Link Type

 

z Auto: Enables the switch to establish automatically point-to-point link.

 

 

z Point to Point: Indicates if a point-to-point link is currently established on

 

 

 

the port. Ports set to Full Duplex modes are considered Point-to-Point

 

 

 

port links.

 

 

 

z Shared: Enables the switch to establish a shared link.

 

Designated Bridge

 

Indicates the bridge priority and the MAC Address of the designated bridge.

 

ID

 

 

 

 

 

 

 

 

Designated Port ID

Indicates the selected port priority and interface.

 

 

 

 

 

Designated Cost

 

Indicates the cost of the port participating in the STP topology. Ports with a

 

 

lower cost are less likely to be blocked if STP detects loops.

 

 

 

 

 

 

 

 

Forward Transitions

 

Indicates the number of times the port has changed from Forwarding state to

 

 

Blocking state.

 

 

 

 

 

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3Com 3CBLSF26H manual Description