Connecting a Switch to an existing Switch

Connecting a Switch to an existing Switch

sw
I have this topology above, all switches are running RSTP
on Switch5 I have disabled the interface linking it to Switch1, so that when I re-enable it I will see the topology change (Amber Lights)
After I have re-enabled the interface on Switch5, I was able to see all interfaces on Switch3 turning Amber, except the one connecting it to Switch1, as shown below.
Though  I was not fast enough to take snapshot and Switch3 interface connecting it to PC3  was in fact also  Amber .

when Switch3 interfaces turned Amber , means there was a Major disruption in the Network for  few seconds before the convergence completed. This means  it caused some screaming in the environment

sw

My Question here is , if each time we add  a new switch  there will be this issue..Then how can we prevent that ? Especially if the existing environment has already this type of Switches design and we cannot change the Design ?

Thank you
jskfanAsked:
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JustInCaseCommented:
If STP is in use it can't be prevented. Typically in companies there is processes how to schedule change, so business departments are informed on time that there will be some downtime (exact time when it will happen). The best time for change is when it will cause least disturbance (typically after business hours or during weekend). In some environments few seconds of downtime are acceptable.
There is a need to know basics about ITIL process (change management part at least) and to integrate Change management processes in company (although, from my experience, it often becomes purpose to itself).
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jskfanAuthor Commented:
Thank you
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JustInCaseCommented:
You're welcome.
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