Administrator Guide

RSTP Parameter Default Value
Port Priority 128
To change these parameters, use the following commands.
• Change the forward-delay parameter.
PROTOCOL SPANNING TREE RSTP mode
forward-delay seconds
The range is from 4 to 30.
The default is 15 seconds.
• Change the hello-time parameter.
PROTOCOL SPANNING TREE RSTP mode
hello-time seconds
NOTE: With large configurations (especially those configurations with more ports) Dell Networking
recommends increasing the hello-time.
The range is from 1 to 10.
The default is 2 seconds.
• Change the max-age parameter.
PROTOCOL SPANNING TREE RSTP mode
max-age seconds
The range is from 6 to 40.
The default is 20 seconds.
To view the current values for global parameters, use the show spanning-tree rstp command from
EXEC privilege mode.
Enable BPDU Filtering Globally
The enabling of BPDU Filtering stops transmitting of BPDUs on the operational port fast enabled ports by
default.
When BPDUs are received, the spanning tree is automatically prepared. By default global bpdu filtering is
disabled.
Enable BPDU Filter globally to filter transmission of BPDU port fast enabled interfaces.
PROTOCOL SPANNING TREE RSTP mode
Rapid Spanning Tree Protocol (RSTP) 779