STP configuration guidelines and restrictions

Follow these configuration guidelines and restrictions when configuring STP and STP variants:

  • Only one form of a standing tree protocol, such as STP or RSTP, can be enabled at a time. You must disable one form of xSTP before enabling another.
  • When any form of STP is enabled globally, that form of STP is enabled by default on all switch ports.
  • LAGs are treated as normal links for any form of STP.
  • The STP is disabled by default on the SLX device. Thus, any new VLANs you configure on the SLX device have STP disabled by default.
  • PVST/RPVST BPDUs are flooded only if PVST/RPVST is not enabled. STP/RSTP (IEEE) BPDUs are never flooded if STP/RSTP is not enabled.
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