Configuring Edge Ports; Configuration Restrictions And Guidelines; Configuration Procedure; Configuring Path Costs Of Ports - HP 5120 EI Series Lan Switching Configuration Manual

Step
2. Enter interface view or port
group view.
3. Configure the maximum rate
of the ports.

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 change occurs, 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 transit 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 transit 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 edge port or ports:
Step
1. Enter system view.
2. Enter interface view or port
group view.
3. Configure the current ports as
edge ports.

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.
Command
•
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
stp transmit-limit limit
Command
system-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
stp edged-port enable
81
Remarks
Use one of the commands.
10 by default.
Remarks
N/A
Use one of the commands.
All ports are non-edge ports
by default.