Administrator Guide
Example of the forward-delay Parameter
To view the current values for MSTP parameters, use the show running-config spanning-tree mstp command from EXEC
privilege mode.
Dell(conf-mstp)#forward-delay 16
Dell(conf-mstp)#exit
Dell(conf)#do show running-config spanning-tree mstp
!
protocol spanning-tree mstp
no disable
name my-mstp-region
MSTI 1 VLAN 100
MSTI 2 VLAN 200-300
forward-delay 16
MSTI 2 bridge-priority 4096
Dell(conf)#
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 MSTP mode
edge-port bpdu filter default
Figure 84. BPDU Filtering Enabled Globally
Modifying the Interface Parameters
You can adjust two interface parameters to increase or decrease the probability that a port becomes a forwarding port.
• Port cost is a value that is based on the interface type. 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.
Multiple Spanning Tree Protocol (MSTP)
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