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Trunk Spanning Tree portfast - Urgent

Hi All

I have just looked at the Physical discrepancy report and can see that spantree portfast has been enabled on a trunk port between 2 switches.

Now I need to disable as this is critical. Can I do now while in production?. Will it lead to any recalculation of spanning tree?

These are live and production switches

set spantree portfast x/y disable

2 REPLIES
Cisco Employee

Re: Trunk Spanning Tree portfast - Urgent

What is the SPT mode you are running on the switch? Spanning-tree reconvergence will happen on these ports. I would suggest you to schedule it in late hours so that to minimize the impact on the network.

-amit singh

Re: Trunk Spanning Tree portfast - Urgent

I cannot answer anything really useful here, sorry about that, because it's a matter of testing the implementation. In theory, I don't see why removing portfast on the trunk would have any impact whatsoever.

Regards,

Francois

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