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Cisco Bug: CSCus49022 - Active switch crashes on changing STP mode from RSTP to PVST w/ 128vlans

Last Modified

Feb 21, 2018

Products (1)

  • Cisco Catalyst 3850 Series Switches

Known Affected Releases


Description (partial)

Changing STP mode from RSTP to PVST in a scaled system,causes switch crash due to stp_change_tree_type,

128 vlans with a large number of interfaces associated with them ( about 92) and the interfaces being physically up.
Number of VPs= 12k approx.
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