Rapid Pvst+ Interoperation With 802.1S Mst; Configuring Rapid Pvst; Enabling Rapid Pvst - Cisco AJ732A - MDS 9134 Fabric Switch Configuration Manual
Cisco nexus 5000 series switch cli software configuration guide, nx-os 4.0(1a)n1 (ol-16597-01, january 2009)
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Chapter 8
Configuring Rapid PVST+
S e n d f e e d b a c k t o n x 5 0 0 0 - d o c f e e d b a c k @ c i s c o . c o m
Note
If you want all switches to renegotiate the protocol, you must restart Rapid PVST+. See the
the Protocol" section on page 8-25
Rapid PVST+ Interoperation with 802.1s MST
Rapid PVST+ interoperates seamlessly with the IEEE 802.1s Multiple Spanning Tree (MST) standard.
No user configuration is needed.
Configuring Rapid PVST+
Rapid PVST+, which has the 802.1w standard applied to the Rapid PVST+ protocol, is the default STP
setting in the software.
You enable Rapid PVST+ on a per-VLAN basis. The software maintains a separate instance of STP for
each VLAN (except on those VLANS on which you disable STP). By default, Rapid PVST+ is enabled
on the default VLAN and on each VLAN that you create.
This section includes the following topics:
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Enabling Rapid PVST+
Once you enable Rapid PVST+ on the switch, you must enable Rapid PVST+ on the specified VLANs
(see
Rapid PVST+ is the default STP mode. You cannot simultaneously run MST and Rapid PVST+.
OL-16597-01
If the switch receives an 802.1D BPDU after the port migration-delay timer has expired, it assumes
that it is connected to an 802.1D switch and starts using only 802.1D BPDUs. However, if the
802.1w switch is using 802.1D BPDUs on a port and receives an 802.1w BPDU after the timer has
expired, it restarts the timer and starts using 802.1w BPDUs on that port.
Enabling Rapid PVST+, page 8-17
Enabling Rapid PVST+ per VLAN, page 8-18
Configuring the Root Bridge ID, page 8-19
Configuring a Secondary Root Bridge, page 8-20
Configuring the Rapid PVST+ Port Priority, page 8-21
Specifying the Link Type, page 8-24
Restarting the Protocol, page 8-25
"Enabling Rapid PVST+ per VLAN" section on page
for more information.
8-18).
Cisco Nexus 5000 Series Switch CLI Software Configuration Guide
Configuring Rapid PVST+
"Restarting
8-17
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