Cisco Cisco Tunnel Terminating Gateway (TTG)

 

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Suspend Old: Suspend processing of the original (old) message, process the new message, then resume 

old message handling. 

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Abort Old: Abort the original message handling and processes the new message. 

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Reject New: The new message is rejected, and the original (old) message is processed. 

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Silent Drop New: Drop the new incoming message, and the old message is processed. 

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Parallel Hndl: Both the original (old) and new messages are handled in parallel. 

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Buffer New: The new message is buffered and processed once the original (old) message processing is 

done. 

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Counter: The number of times each collision type has occurred. 

 The Message Collision Statistics section of the command output only appears if any of the collision 

statistics have a counter total that is greater than zero. 

Sample output: 

Message Collision Statistics 

  Interface   Old Proc (Msg Type)     New Proc (Msg Type)     Action   Counter 

   SGW(S5)  NW Init Bearer Create (95) NW Init PDN Delete (99) Abort Old  1 

In this instance, the output states that at the S-GW egress interface (S5) a Bearer creation procedure is going on due to a 
CREATE BEARER REQUEST(95) message from the P-GW. Before its response comes to the S-GW from the MME, a 
new procedure PDN Delete is triggered due to a DELETE BEARER REQUEST(99) message from the P-GW. 

The action that is carried out due to this collision at eGTP-C is to abort (Abort Old) the Bearer Creation procedure and 
carry on normally with the PDN Delete procedure. The Counter total of 1 indicates that this collision happened only 
once.