Lenovo RackSwitch G8264CS Cli Command Reference page 424

Bridge RSTP/PVRST Configuration
424
G8264CS Command Reference for ENOS 8.4
Spanning Tree bridge parameters affect the global STG operation of the switch.
STG bridge parameters include:
 Bridge priority
 Bridge hello time
 Bridge maximum age
 Forwarding delay
When configuring STG bridge parameters, the following formulas must be used:
 2 × (forwarding delay ‐ 1) > bridge maximum age
 2 × (bridge hello time + 1) < bridge maximum age
Table 219.
Bridge Spanning Tree Configuration Options
Command Syntax and Usage
spanning­tree stp <1‐256> bridge forward­delay <4‐30>
Configures the bridge forward delay parameter. The forward delay parameter
specifies the amount of time that a bridge port has to wait before it changes
from the discarding and learning states to the forwarding state.
The range is 4 to 30 seconds and the default is 15 seconds.
Note: This command does not apply to MSTP.
Command mode: Global configuration
no spanning­tree stp <1‐256> bridge forward­delay
Resets the bridge forward delay parameter to its default value of 15 seconds.
Command mode: Global configuration
spanning­tree stp <1‐256> bridge hello­time <1‐10>
Configures the bridge Hello time.The Hello time specifies how often the
bridge transmits a configuration bridge protocol data unit (BPDU). Any bridge
that is not the root bridge uses the root bridge Hello value.
The range is 1 to 10 seconds and the default is 2 seconds.
Note: This command does not apply to MSTP.
Command mode: Global configuration
no spanning­tree stp <1‐256> bridge hello­time
Resets the birdge Hello time to its default value of 2 seconds.
Command mode: Global configuration
spanning­tree stp <1‐256> bridge maximum­age <6‐40>
Configures the bridge maximum age. The maximum age parameter specifies
the maximum time the bridge waits without receiving a configuration bridge
protocol data unit before it re configures the STG network.
The range is 6 to 40 seconds and the default is 20 seconds.
Note: This command does not apply to MSTP.
Command mode: Global configuration