Spanning-Tree Bpdu-Filter; Spanning-Tree Bpdu-Guard - Edge-Core ECS4610-24F Management Manual

| Spanning Tree Commands
C 35
HAPTER
spanning-tree bpdu-
filter
spanning-tree bpdu-
guard
This command filters all BPDUs received on an edge port. Use the no form
to disable this feature.
S
YNTAX
[no] spanning-tree bpdu-filter
D S
EFAULT ETTING
Disabled
C M
OMMAND ODE
Interface Configuration (Ethernet, Port Channel)
C U
OMMAND SAGE
This command filters all Bridge Protocol Data Units (BPDUs) received on
◆
an interface to save CPU processing time. This function is designed to
work in conjunction with edge ports which should only connect end
stations to the switch, and therefore do not need to process BPDUs.
However, note that if a trunking port connected to another switch or
bridging device is mistakenly configured as an edge port, and BPDU
filtering is enabled on this port, this might cause a loop in the spanning
tree.
Before enabling BPDU Filter, the interface must first be configured as an
◆
edge port with the spanning-tree edge-port
E
XAMPLE
Console(config)#interface ethernet ethernet 1/5
Console(config-if)#spanning-tree edge-port
Console(config-if)#spanning-tree bpdu-filter
Console(config-if)#
R C
ELATED OMMANDS
spanning-tree edge-port (820)
This command shuts down an edge port (i.e., an interface set for fast
forwarding) if it receives a BPDU. Use the no form to disable this feature.
S
YNTAX
[no] spanning-tree bpdu-guard
D S
EFAULT ETTING
Disabled
C M
OMMAND ODE
Interface Configuration (Ethernet, Port Channel)
– 818 –
command.