TRENDnet TI-PG1284i User Manual page 124

TRENDnet User's Guide
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.
Default Settings
STP/RSTP : disabled.
STP/RSTP mode : RSTP.
Forward Time
Hello Time : 2 seconds.
Maximum Age : 20 seconds.
System Priority : 32768.
Transmission Limit : 3 seconds.
Per port STP state : enabled.
Per port Priority : 128.
Per port Edge port : disabled.
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: 15 seconds.
Per port BPDU filter : disabled.
Per port BPDU guard : disabled.
Per port BPDU Root guard: disabled.
Per port Path Cost : depend on port link speed.
Example: Bandwidth -> STP Port Cost Value
10 Mbps -> 100
100 Mbps-> 19
1 Gbps -> 4
10 Gbps -> 2
CLI Configuration
Node Command
enable show spanning-tree
active
enable show spanning-tree
blockedports
enable show spanning-tree
port detail PORT_ID
enable show spanning-tree
statistics PORT_ID
enable show spanning-tree
summary
enable clear spanning-tree
counters
enable clear spanning-tree
counters PORT_ID
configure spanning-tree (disable
| enable)
configure spanning-tree
algorithm-timer
forward-time TIME
TI-PG1284i
Description
This command displays the spanning tree
information for only active port(s)
This command displays the spanning tree
information for only blocked port(s)
This command displays the spanning tree
information for the interface port.
This command displays the spanning tree
information for the interface port.
This command displays the summary of port
states and configurations
This command clears spanning-tree statistics
for all ports.
This command clears spanning-tree statistics
for a specific port.
This command disables / enables the
spanning tree function for the system.
This command configures the bridge times
(forward-delay,max-age,hello-time).
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