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Spirent TestCenter: Layer3 ISIS and Layer2 ISIS (L2MP) can not be configured on the same Portgroup

Objective/Summary
-Error----2021-09-05T08-49-42[MainThread][spirent]> Failed to execute perform.500 INTERNAL SERVER ERROR: STC exception: in perform: There were 1 validation error(s); aborting apply.

Layer3 ISIS and Layer2 ISIS (L2MP) can not be configured on the same Portgroup R1-Port1 //1/1, R1-port2 //1/2, R2-Port1 //1/4, R2-port2 //1/5.
Environment/Versions
  • Spirent TestCenter
  • Layer 2 ISIS
  • Layer 3 ISIS
Procedure
As the error suggest, on Spirent TestCenter, you cannot have Layer2 and Layer3 ISIS emulated devices configured on the same port group.  To solve the issue you can:
  • Change everything to either Layer 2 or Layer 3.
  • Leave all the Layer 2 devices in one port and all the Layer 3 devices on a separate one.  Both ports must be in different port groups.
Notes
another methods,

"enable jumbo LLC" can let them work well. 

Product : Spirent TestCenter,ISIS