I have a server connected to a access port with a default config and its in production. Right now, i want to configure that port to "spanning tree port fast".
will there be any flap/packet drop if i configure to port fast ? QUICK RESPONSE WILL BE HELPFUL.
The port should not flap after Spanning-Tree Portfast has been enabled (if everything else is fine). You will see the usual warning like the one below
Warning: Spantree port fast start should only be enabled on ports connected
to a single host. Connecting hubs, concentrators, switches, bridges, etc. to
a fast start port can cause temporary spanning tree loops. Use with caution.
Thanks for the update.
My question is, will there be any flap if the port is active and we are configuring to port fast ?
Let me try with packettracer as wel.
Not if everything else is configured properly and the layout is the one you described me. I still recommend you to verify it quickly.
perhaps you can give the copy of show tech-support command first, so that we can see the switch current state of spanning tree
but if you in a critical time, is there any port available on the current switch to do the testing