cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
50353
Views
10
Helpful
4
Replies

How to enable RSTP

omal
Beginner
Beginner

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.

4 Replies 4

Bobby Thekkekandam
Cisco Employee
Cisco Employee

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

mail4ramsay
Beginner
Beginner

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

Joseph W. Doherty
Hall of Fame Master Hall of Fame Master
Hall of Fame Master
The other posters have shown how to enable rapid-STP, but on a 2950, depending on the "age" of the IOS, it might not offer rapid-STP as a feature.
Getting Started

Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: