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New Member

How to enable RSTP

Hi

Can someone please explain how to enable RSTP in the switch (Let's say in 2950 switch).

Or do you have RSTP running in now-a-days switches?

Thanks in advance!

Chris.

2 REPLIES
Cisco Employee

Re: How to enable RSTP

Hi Chris,

The command to enable it is "spanning-tree mode rapid-pvst

This and other config requirements for RSTP are documented here:

http://www.cisco.com/univercd/cc/td/doc/product/lan/cat2950/12122ea5/2950scg/swstp.htm

HTH,

Bobby

New Member

How to enable RSTP

Cisco switches by default run PVST+ (Per VLAN Spanning Tree+) which is compatible with 802.1d STP.  Most newer switches support PVST+, Rapid-PVST+ & MST.  With IOS-based switches you can check what version you are running with the command 'show spanning-tree summary':

switch#show spanning-tree summary
Switch is in rapid-pvst mode

<<<< Output Omitted >>>              

switch#

To change the STP mode use the global configuration command 'spanning-tree mode XXX':

switch(config)#spanning-tree mode ?
  mst         Multiple spanning tree mode
  pvst        Per-Vlan spanning tree mode
  rapid-pvst  Per-Vlan rapid spanning tree mode

Switch(config)#spanning-tree mode rapid-pvst
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