Users Guide

Rapid per-VLAN spanning-tree plus
Rapid per-VLAN spanning-tree plus (RPVST+) is used to create a single topology per VLAN. RPVST+ is enabled by default; it provides
faster convergence than STP and runs on the default VLAN (VLAN 1).
Conguring 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. .
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 modied for each VLAN to enable dierent forwarding topologies.
Layer 2
407