Stp Interface Loop-Protection - H3C s3600 series Command Manual

Use the stp interface edged-port disable command to configure the specified Ethernet ports as
non-edge ports in system view.
Use the undo stp interface edged-port command to restore the specified Ethernet ports to the default
state.
By default, all Ethernet ports of a switch are non-edge ports.
An edge port is a port that is directly connected to a user terminal instead of another switch or a network
segment. Rapid transition to the forwarding state is applied to edge ports because on these ports no
loops can be incurred by network topology changes. You can enable a port to turn to the forwarding
state rapidly by setting it to an edge port. And you are recommended to configure the Ethernet ports
directly connected to user terminals as edge ports to enable them to turn to the forwarding state rapidly.
Normally, configuration BPDUs cannot reach an edge port because the port is not connected to another
switch. But when the BPDU guard function is disabled on an edge port, configuration BPDUs sent
deliberately by a malicious user may reach the port. If an edge port receives a BPDU, it turns to a
non-edge port.
Related commands: stp edged-port.
With the loop guard function enabled, the root guard function and the edge port configuration are
mutually exclusive.
Examples
# Configure Ethernet 1/0/3 as an edge port.
<Sysname> system-view
System View: return to User View with Ctrl+Z.
[Sysname] stp interface Ethernet 1/0/3 edged-port enable

stp interface loop-protection

Syntax
stp interface interface-list loop-protection
undo stp interface interface-list loop-protection
View
System view
Parameters
interface-list: Ethernet port list. You can specify multiple Ethernet ports by providing this argument in the
form of interface-list = { interface-type interface-number [ to interface-type interface-number ] } &<1-10>,
where &<1-10> means that you can provide up to 10 port indexes/port index ranges for this argument.
Description
Use the stp interface loop-protection command to enable the loop guard function in system view.
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