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Cisco Bug: CSCvt17574 - Portfast behavior change from 15.0

Last Modified

Mar 06, 2020

Products (1)

  • Cisco Catalyst 2960 Series Switches

Known Affected Releases


Description (partial)

The issue is related to the status of portfast for a specific port when we have portfast enabled globaly, and we receive BPDUs on that port.

In case of IOS 15.0 we see the portfast status as disabled:
2960X-Stack#sh spann int gi1/0/1 portfast
VLAN0008            disabled             <<<<<<<<<<<<<<<<

In case of IOS 15.2 we see the portfast status as enabled:
2960X-Stack#sh spann int gi1/0/1 portf edge
VLAN0008            enabled             <<<<<<<<<<<<<<<<

This is just a cosmetic difference. In both cases portfast is working fine.

portfast enabled on switch
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