Configuring The Maximum Port Rate; Configuring Edge Ports - HP 3100 Series Configuration Manual

After the network topology is stabilized, each non-root-bridge device forwards configuration BPDUs
to the downstream devices at the interval of hello time to determine whether any link is faulty. If a
device does not receive a BPDU from the upstream device within nine times the hello time, it
assumes that the upstream device has failed and starts a new spanning tree calculation process.
Sometimes a device might fail to receive a BPDU from the upstream device because the upstream
device is busy. If a spanning tree calculation occurs, the calculation can fail and also waste network
resources. In a stable network, you can prevent undesired spanning tree calculations by setting the
timeout factor to 5, 6, or 7.
To configure the timeout factor:
Step
Enter system view.
1.
Configure the timeout factor of the
2.
device.

Configuring the maximum port rate

The maximum rate of a port refers to the maximum number of BPDUs the port can send within each
hello time. The maximum rate of a port is related to the physical status of the port and the network
structure.
The higher the maximum port rate is, the more BPDUs will be sent within each hello time, and the
more system resources will be used. By setting an appropriate maximum port rate, you can limit the
rate at which the port sends BPDUs and prevent spanning tree protocols from using excessive
network resources when the network becomes unstable. Hewlett Packard Enterprise recommends
you to use the default setting.
To configure the maximum rate of a port or a group of ports:
Step
Enter system view.
1.
Enter interface view or port
2.
group view.
Configure the maximum rate
3.
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 transition
rapidly from the blocked state to the forwarding state.
Command
system-view
stp timer-factor factor
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 transmit-limit limit
71
Remarks
N/A
3 by default.
Remarks
N/A
Use one of the commands.
10 by default.