Users Guide

Rapid per-VLAN spanning-tree
Rapid per-VLAN spanning-tree (Rapid-PVST) is used to create a single topology per VLAN. Rapid-PVST is enabled by default; it
provides faster convergence than STP and runs on the default VLAN (VLAN 1).
Configuring Rapid-PVST is a four-step process:
1. Ensure the interfaces are in L2 mode.
2. Place the interfaces in VLANs. By default, switchport interfaces are members of the default (VLAN1).
3. Enable Rapid-PVST. This step is only required if another variation of STP is present.
4. (Optional) Select a non-default bridge-priority for the VLAN for load balancing.
Each VLAN is assigned an incremental default bridge priority. For example, if VLAN 1 is assigned a bridge priority value of 32769,
then VLAN 2 (if created) is assigned a bridge priority value of 32770; similarly, VLAN 10 (if created) is assigned a bridge priority
value of 32778, and so on. All three instances have the same forwarding topology.
NOTE:
Z9332F-ON supports a total of 64 instances, of which 3 VLANs are used for internal purposes. When you run
Rapid-PVST flavor, each VLAN allocates one instance until the VLAN count reaches 61 and map the default instance after
that.
Load balance and root selection
By default, all VLANs use the same forwarding topology — R2 is elected as the root and all 10G Ethernet ports have the same
cost. Bridge priority can be modified for each VLAN to enable different forwarding topologies.
Layer 2
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