How to enable RSTP

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Feb 24th, 2006
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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.

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mail4ramsay Sat, 03/24/2012 - 05:22
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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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