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

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DDN reduced to half from SGW. What are possible cause for it?
posted Jan 5, 2017 by anonymous

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Could be due to changes done at cgnat  especially on the tcp side and also sgw buffer timer changes at sgw.
Another reason could be implementation of low priority ddn throttling mechanism
hi,
We have done changes in IGR for routing, Could you explain howDDN reduced when changes done on NAT on tcp Side.

1 Answer

0 votes

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.

answer Jan 6, 2017 by Harshita
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.
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..
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