DOCA0110EN-06

RSTP Ports

Description

This page displays the diagnostic data of RSTP ports.

RSTP Configuration Procedure

Step

Action

Result

1

From the Link150 menu bar, click Diagnostics.

Opens the Diagnostics menu.

2

From the Diagnostics menu, in the Redundancy submenu, click RSTP Ports.

Opens the RSTP Ports page.

Port 1 and 2 Parameters

Parameter

Description

Setting

State

Current state of the port.

By default, it is disabled, blocking, and forwarding.

NOTE: Other states like listening, learning are intermediate states which are not visible to the user.

0 to disable RSTP

1 to enable RSTP

Default setting: 0

Role

Current role of the port in the ring.

If the port state is disabled, the role can be either Root or Designated.

If the port state is disabled (Ethernet link is down) then the Role is Unknown.

-

Priority

The value of the port priority is contained in Port Identifier. All ports of a bridge will have a port identifier with format: [1 byte port number][1 byte port priority].

NOTE: The below points are provided for understanding the usage of port priority (port identifier).
  • Port that carries packets to root bridge is root port. When there are multiple such ports exist, one with least Port Identifier becomes the root port, and others will become alternate ports.

  • Port Number: Port number cannot be configured. In the device the port Number (interface number) for port-1 is 1 and port number for port-2 is 2.

0 - 240 (in steps of 16)

Default setting: 128

Port Path Cost

The contribution of this port to the path cost of paths towards the Root bridge which includes this port.

For Auto mode, the default value of the port path cost changes based on the Link Speed. i.e for 100 mbps the default value is 200000 and for 10 mbps the default value is 2000000.

These are the speeds supported by the device.

Received RST (BPDUs)

Total number of RSTP BPBUs received by this port since the last reset counters.

-

Transmitted RST (BPDUs)

Total number of RSTP BPBUs transmitted by this port since the last reset counters.

-

Received TCN (BPDUs)

Total number of Topology Change BPBUs received by this port since the last reset counters.

-

Transmitted TCN (BPDUs)

Total number of Topology Change BPBUs transmitted by this port since the last reset counters.

-

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