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Cisco Bug: CSCuq78422 - Fabricpath - 1st CE port bringup places interface in L2G Blocking state

Last Modified

Sep 09, 2019

Products (7)

  • Cisco Nexus 5000 Series Switches
  • Cisco Nexus 5596UP Switch
  • Cisco Nexus 5548P Switch
  • Cisco Nexus 6004 Switch
  • Cisco Nexus 6001 Switch
  • Cisco Nexus 5548UP Switch
  • Cisco Nexus 5596T Switch

Known Affected Releases

6.0(2)N2(4) 7.0(3)N1(0.125)

Description (partial)

In Fabricpath on N5k/N6k switches when the first Edge (CE) port comes up or flaps in working topology, L2 Gateway places this port in Blocking state detecting inconsistency:
%STP-2-L2GW_BACKBONE_BLOCK: L2 Gateway Backbone port inconsistency blocking port ......

Fabricpath configured with Pseudo configuration and Edge switch has the only CE edge port flapping or CE switch reloading.
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