Stp Bridge-Diameter - H3C s3600 series Command Manual

View
System view
Parameters
None
Description
Use the stp bpdu-protection command to enable the BPDU guard function on the switch.
Use the undo stp bpdu-protection command to restore to the default state of the BPDU guard
function.
By default, the BPDU guard function is disabled.
Normally, the access ports of the devices operating on the access layer are directly connected to
terminals (such as PCs) or file servers. These ports are usually configured as edge ports to implement
rapid transition. But they resume non-edge ports automatically upon receiving configuration BPDUs,
which causes spanning trees recalculation and network topology jitter.
Normally, no configuration BPDU will reach edge ports. But malicious users can attack a network by
sending configuration BPDUs deliberately to edge ports to cause network jitter. You can prevent such
attacks by enabling the BPDU guard function. With this function enabled on a switch, the switch shuts
down the edge ports that receive configuration BPDUs and then reports these cases to the
administrator. If an edge port is shut down, only the administrator can restore it.
Examples
# Enable the BPDU guard function.
<Sysname> system-view
System View: return to User View with Ctrl+Z.
[Sysname] stp bpdu-protection
As Gigabit ports of an S3600 Ethernet switch cannot be shut down, the BPDU guard function is not
applicable to these ports even if you enable the BPDU guard function and specify these ports to be
MSTP edge ports.

stp bridge-diameter

Syntax
stp bridge-diameter bridgenum
undo stp bridge-diameter
View
System view
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