Dell Force10 MXL Blade - Enable BPDU Filtering Globally

408 | Per-VLAN Spanning Tree Plus (PVST+)
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To change PVST+ parameters, use the following commands on the Root Bridge:
To view the values for the global PVST+ parameters, use the
show spanning-tree pvst command
(Figure 23-4).
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.
Task Command Syntax Command Mode
Change the forward-delay parameter.
• Range: 4 to 30
• Default: 15 seconds
vlan forward-delay
PROTOCOL PVST
Change the hello-time parameter.
Note: With large configurations (especially those with more
ports), Dell Force10 recommends that you increase the
hello-time.
Range: 1 to 10
Default: 2 seconds
vlan hello-time
PROTOCOL PVST
Change the max-age parameter.
Range: 6 to 40
Default: 20 seconds
vlan max-age
PROTOCOL PVST