Dell EMC SmartFabric OS10 User Guide Release 10.5.0

All non-root bridges accept the timer values on the root bridge.

Forward-time

Amount of time required for an interface to transition from the Discarding state to the Learning state or from the Learning state to the Forwarding state.

Hello-time

Time interval within which the bridge sends BPDUs.

Max-age

Length of time the bridge maintains configuration information before it refreshes information by recomputing the Rapid-PVST topology.

• Modify the forward-time in seconds in CONFIGURATION mode, from 4 to 30, default 15.

  spanning-tree vlan vlan-id forward-time seconds

• Modify the hello-time in seconds in CONFIGURATION mode, from 1 to 10, default 2. With large configurations involving more numbers of ports, Dell EMC recommends increasing the hello-time.

  spanning-tree vlan vlan-id hello-time seconds

• Modify the max-age (in seconds) in CONFIGURATION mode, from 6 to 40, default 20.

  spanning-tree vlan vlan-id max-age seconds

View Rapid-PVST global parameters

OS10# show spanning-tree active
Spanning tree enabled protocol rapid-pvst with force-version rstp
VLAN 1
Executing IEEE compatible Spanning Tree Protocol
Root ID    Priority 32769, Address 90b1.1cf4.a523
Root Bridge hello time 2, max age 20, forward delay 15
Bridge ID    Priority 32769, Address 90b1.1cf4.a523
We are the root of VLAN 1
Configured hello time 2, max age 20, forward delay 15