RSTP

RSTP (Rapid Spanning Tree Protocol) allows IT specialists to re-establish communication paths through Ethernet after a detected interruption.

NOTICE
hazard of incorrect configuration Do not enable RSTP if you do not have the necessary skills to configure the network. Ensure that the network supports RSTP and is correctly configured before enabling RSTP. Failure to follow these instructions can result in the interruption of normal operation.

This function is available on Panel Server Universal and Advanced.

The RSTP function is available when the Ethernet ports are set to Switched mode.

NOTE: When RSTP is enabled, it is not possible to change the Ethernet ports to Separated mode.

The RSTP function is set on the Panel Server webpages at Settings > Network communication > RSTP. Enable RSTP to display all settings.

NOTE: The default parameters proposed in the Panel Server webpages differ from RSTP standards in order to optimize network stability.

Parameter	Description
Ethernet mode	Displays the mode selected in Ethernet settings. RSTP is only available to enable if the Ethernet ports are set to Switched mode.
Rapid Spanning Tree Protocol (RSTP) activation	Click the toggle switch to enable RSTP.

Parameter	Description	Setting
Bridge priority	Used to enter the bridge priority.	Setting range: 12288–61440 (in multiples of 4096) Default setting: 32768
Bridge hello time (s)	Used to enter the bridge hello time in seconds.	Setting range: 1–2 s Default setting: 2 s
Bridge max age time (s)	Used to enter the bridge maximum age time in seconds.	Setting range: 6–40 s Default setting: 40 s NOTE: Follow this rule when setting the Bridge max age time: 2 x (Bridge hello time + 1 s) ≤ Bridge max age time ≤ 2 x (Bridge forward delay - 1 s)
Transmit hold count (messages)	Used to enter the number of messages in the transmit hold count.	Setting range: 1–10 messages Default setting: 6 messages
Bridge forward delay (s)	Used to enter the bridge forward delay time in seconds.	Setting range: 4–30 s Default setting: 21 s

Port	Parameter	Setting
ETH1 port settings	Port priority	Setting range: 0–240 (in steps of 16) Default setting: 128
ETH1 port settings	Port path cost	Setting range: 0–200,000,000 Default setting: 0, which is the Auto setting meaning that the port path cost is calculated based on the ETH port link speed. The calculated value is available in the diagnostic log.
ETH2 port settings	Port priority	Range: 0–240 (in steps of 16) Default setting: 128
ETH2 port settings	Port path cost	0–200,000,000 Default setting: 0, which is the Auto setting meaning that the port path cost is calculated based on the ETH port link speed. The calculated value is available in the diagnostic log.

The following diagnostic data is available by exporting diagnostic logs.

Bridge diagnostics:
- Total topology changes
Port diagnostics (available for each port):
- Received RST (BPDUs) : total number of RSTP BPDUs received by Port 1 since the RSTP feature was activated
- Transmitted RST (BPDUs) : total number of RSTP BPDUs transmitted by Port 1 since the RSTP feature was activated
- Received TCN (BPDUs) : total number of topology change BPDUs received by Port 1 since the RSTP feature is activated
- Transmitted TCN (BPDUs) : total number of topology change BPDUs transmitted by Port 1 since the RSTP feature is activated