Spanning Tree enabled only in one Switch

[diego.rivera21]

Hi everybody, 

I have a question that maybe could be a silly question, but I have to ask it.  If I have a redundant topology and disable Spanning Tree on all the switches except one, what's the difference if I set Spanning Tree on all the switches? Maybe the figure can explain better my question. 

I disabled Spanning Tree on all the switches except Multilayer Switch0. It appears to blocked a port because Spanning Tree Protocol, so no loops are gonna appear.  Is it make any sense if I set Spanning Tree on the other switches? What will happen if I won't do it?

Thank you in advance for your help. 

[paul driver · Accepted solution]

Hello

I assume these switches are all layer 2 interconnected ?

if so and you don't enable stp then there is a good chance a loop would occur in the future 

it only takes some misconfiguration on a swich, faulty teamed server or an inadvertently cross connection between two switches to introduce a loop and bring down your entire LAN

So personally I would suggest enable it on all switches

res

Paul

[acampbell]

Diego,

Totally agree with Paul (+5)

You look to have a physical ring in your design.

You would be mad not to run STP on all switches.

Prevention is better than cure.

Tryin to fault on a looping lan especially if you are remote can be be
extremely taxing.

Regards
Alex

[diego.rivera21]

Hi, Paul and Alex

Thanks for your help.  Now I'm sure about enabling STP on all switches. 

Greetings. 

Diego.