Deployment Guide
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 ltering is disabled.
Enable BPDU Filter globally to lter transmission of BPDU port fast enabled interfaces.
PROTOCOL SPANNING TREE RSTP mode
edge-port bpdu filter default
Figure 103. BPDU Filtering Enabled Globally
Modifying Interface Parameters
On interfaces in Layer 2 mode, you can set the port cost and port priority values.
• Port cost — a value that is based on the interface type. The previous table lists the default values. The greater the port cost, the less
likely the port is selected to be a forwarding port.
• Port priority — inuences the likelihood that a port is selected to be a forwarding port in case that several ports have the same port
cost.
To change the port cost or priority of an interface, use the following commands.
• Change the port cost of an interface.
INTERFACE mode
Rapid Spanning Tree Protocol (RSTP)
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