The problem of traffic to the RNC E******* 3810 and RAB Setup PS

[s52d]

Hi!
RNC SW - P7, License about 925 Mbitps, RNC Iub Thr ~ 800 Mbitps
From experience, licensing restrictions cut traffic ( limiting the RNC Iub traffic ), but does not lead to the concavity of curve

Hi!
I recall simmilar pictures. When licence triggered, traffic was halved and oscilating. Ugly and nasty.
We upgraded HW and SW, so we are far from limits.

BR
s52d

[GrayDog]

thresholds used and recomended for E*******:

- mMP Load……………………………………Less than 75%
- RANAP/RNSAP MP Load………………….Less than65%
- SP (Dc Load)……………………………….. Less than85%
- SP Cc, Pdr) Load……………………………Less than60%
- RNC Active Users……………………………Less than90% of licensed capacity
- RNC Iub Throughput……………………….. Lessthan 90% of licensed capacity, but its value depends of the other thresholds

true, RNC in a high load (overload), but in the following graph shows that at higher load can have a normal form of traffic (PDR_LOAD) and do not have any problems with failures RAB_Setup_PS. These changes are related to configuration changes in PS Core, but it is not clear what leads to such results. So, I guess, and what to look for the problem in PS Core (or IP BackBone).
RNC problem 2.jpg

[GrayDog]

The problem resolved after reducing the number of NodeB to the RNC and fix problems on the GGSN. Problems in the GGSN creating additional load on the RNC. It is important that the 3810 license capacity values ​​IuB 800Mbps or 900Mbps is almost impossible to use because of a specific traffic model, which does not match with the model by default. In fact, a RNC limit of about 600 - 700 Mbps.

[shamim23]

Thanks Gray. Can you please tell us more about the problem faced in GGSN?