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TRENDnet User's Guide
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
rootinconsistent 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.
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Default Settings:
STP/RSTP:
STP/RSTP mode:
Forward Time:
Hello Time:
Maximum Age:
System Priority:
Transmission Limit:
Per port STP state:
Per port Priority:
Per port Edge port:
Per port BPDU filter:
Per port BPDU guard:
Per port BPDU Root guard:
Per port Path Cost:
Example: Bandwidth
->
10 Mbps
->
100 Mbps
->
1 Gbps
->
10 Gbps
->
CLI Configuration
Node
Command
enable
show spanning-tree active
Managed Industrial L2 Switch
disabled.
RSTP.
15 seconds.
2 seconds.
20 seconds.
32768.
3 seconds.
enabled.
128.
disabled.
disabled.
disabled.
disabled.
depend on port link speed.
STP Port Cost Value
100
19
4
2
Description
This command displays the
spanning tree information for only
active port(s)
95
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