Table of Contents
Advertisement
Transmission Limit:
This is used to configure the minimum interval between the transmissions of consecutive
RSTP BPDUs. This function can only be enabled in RSTP mode. The range is from 1 to 10
seconds.
Hello Time:
Set the time at which the root switch transmits a configuration message. The range is from
1 to 10 seconds.
Bridge Priority:
Bridge priority is used in selecting the root device, root port, and designated port. The device
with the highest priority becomes the STA root device. However, if all devices have the
same priority, the device with the lowest MAC address will become the root device.
Port Priority:
Set the port priority in the switch. Low numeric value indicates a high priority. A port with
lower priority is more likely to be blocked by STP if a network loop is detected. The valid
value is from 0 to 240.
Path Cost:
The valid value is from 1 to 200000000. Higher cost paths are more likely to be blocked by
STP if a network loop is detected.
BPDU Guard:
This is a per port setting. If the port is enabled in BPDU guard and receive any BPDU, the
port will be set to disable to avoid the error environments. User must enable the port by
manual.
BPDU Filter:
It is a feature to filter sending or receiving BPDUs on a switch port. If the port receives any
BPDUs, the BPDUs will be dropped.
Notice:
If both of the BPDU filter and BPDU guard are enabled, the BPDU filter has the high priority.
Root Guard:
The Root Guard feature forces an interface to become a designated port to prevent surrounding
switches from becoming a root switch. In other words, Root Guard provides a way to enforce
the root bridge placement in the network. The Root Guard feature prevents a Designated Port
from becoming a Root Port. If a port on which the Root Guard feature receives a superior
BPDU, it moves the port into a root-inconsistent state (effectively equal to a listening state),
thus maintaining the current Root Bridge status. The port can be moved to forwarding state if
no superior BPDU received by this port for three hello times.
206
Advertisement
Table of Contents
