H3c-technologies H3C WX5500E Series Access Controllers Bedienungsanleitung Seite 89

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Configuring edge ports
If a port directly connects to a user terminal rather than another device or a shared LAN segment, this
port is regarded as an edge port. When network topology changes occur, an edge port will not cause
a temporary loop. Because a device does not determine whether a port is directly connected to a
terminal, you must manually configure the port as an edge port. After that, the port can transition rapidly
from the blocked state to the forwarding state.
Configuration restrictions and guidelines
If BPDU guard is disabled, a port set as an edge port will become a non-edge port again if it
receives a BPDU from another port. To restore the edge port, re-enable it.
If a port directly connects to a user terminal, configure it as an edge port and enable BPDU guard
for it. This enables the port to transition to the forwarding state quickly while ensuring network
security.
You cannot configure edge port settings and loop guard on a port at the same time.
Configuration procedure
To specify a port or a group of ports as an edge port or ports:
Ste
p
Command
Remarks
1. Enter system view.
system-view N/A
2. Enter interface view or port
group view.
Enter Layer 2 Ethernet interface view or
Layer 2 aggregate interface view:
interface interface-type
interface-number
Enter port group view:
port-group manual port-group-name
Use one of the commands.
3. Configure the current ports as
edge ports.
stp edged-port enable
All ports are non-edge ports
by default.
Configuring path costs of ports
Path cost is a parameter related to the rate of a port. On a spanning tree device, a port can have different
path costs in different MSTIs. Setting appropriate path costs allows VLAN traffic flows to be forwarded
along different physical links, achieving VLAN-based load balancing.
You can have the device automatically calculate the default path cost, or you can configure the path cost
for ports.
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