06-20-2012 12:43 AM - edited 03-07-2019 07:20 AM
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.
06-20-2012 01:09 AM
Hi Vikneswaran,
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.
06-20-2012 01:24 AM
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.
06-20-2012 01:40 AM
Not if everything else is configured properly and the layout is the one you described me. I still recommend you to verify it quickly.
06-20-2012 02:18 AM
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
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