DDN reduced to half from SGW. What are possible cause for it?

Question

GTP tunnel id is a 32-bit long value over one IP address combination. Suppose there are two nodes A and B which has IP addresses X and Y respectively. Is it possible when first GTP tunnel id range gets exhausted then both the nodes starts using different IP address combination and again GTP tunnel id range can be re-used ? If it is impossible then what could be the reason ?

Answer 1

If I understood your question and what I know through specification, SGW sends downlink data notification (DDN) to MME with a ARP for the bearer bearer Id data is received. MME priorities paging messages based on received ARP. I think due to this prioritization of paging based on ARP value, DDN reduces at SGW.
Please correct me if my understanding is wrong.

Comments

hi,
In Our network no priority has been set at SGW and also checked from pre and post traces no difference has been seen in DDN for ARP priority and also multiple MME are connected with same SGW and results are same for all.

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Some activies might have been done at cgnat,cdn etc like tcp optimisation some tcp timer change or window size change.check tcp counters in gw..