Using Mistp-Pvst+ Or Mistp - Cisco WS-X6066-SLB-APC - Content Switching Module Software Manual

Using MISTP-PVST+ or MISTP

To disable PVST+, perform this task in privileged mode:
Task
Disable PVST+ mode on a VLAN.
This example shows how to disable PVST+ on a VLAN:
Console> (enable) set spantree disable 4
Spantree 4 disabled.
Console> (enable)

Using MISTP-PVST+ or MISTP

The default spanning tree mode on the Catalyst 6000 family switches is PVST+. If you want to use
MISTP mode in your network, we recommend you carefully follow the procedures described in the
following sections in order to avoid losing connectivity in your network.
When you change the spanning tree mode, the current mode stops, the information collected at runtime is used
to build the port database for the new mode, and the new spanning tree mode restarts the computation of the
active topology. Information about the port states is lost; however, all of the configuration parameters are
preserved for the previous mode. If you return to the previous mode, the configuration is still there.
We recommend that if you use MISTP mode, you should configure all of your Catalyst 6000 family
Note
switches to run MISTP.
To use MISTP mode, you first enable an MISTP instance, then map at least one VLAN to the instance.
You must have at least one forwarding port in the VLAN in order for the MISTP instance to be active.
Map VLANs to MISTP instances on Catalyst 6000 family switches that are either in VTP server
Note
mode or transparent mode only. You cannot map VLANs to MISTP instances on switches that are in
VTP client mode.
If you are changing a switch from PVST+ mode to MISTP mode and you have other switches in the
network that are using PVST+, you must first enable MISTP-PVST+ mode on each switch on which you
intend to use MISTP so that PVST+ BPDUs can flow through the switches while you configure them.
When all switches in the network are configured in MISTP-PVST+, you can then enable MISTP on all
of the switches.
These sections describe how to use MISTP-PVST+ or MISTP:
•
•
•
•
•
Catalyst 6000 Family Software Configuration Guide—Releases 6.3 and 6.4
8-22
Default MISTP and MISTP-PVST+ Configuration, page 8-23
Setting MISTP-PVST+ Mode or MISTP Mode, page 8-23
Configuring an MISTP Instance, page 8-25
Mapping VLANs to an MISTP Instance, page 8-29
Disabling MISTP-PVST+ or MISTP, page 8-31
Chapter 8 Configuring Spanning Tree
Command
set spantree disable vlans [all]
78-13315-02