Oracle Communications Diameter Signaling Router (DSR)
 

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Symptoms

Changes

Cause

Solution

5.0

6.0

Workaround

References

Created from <SR 3-14285920161>

Applies to:

Symptoms

On the upgraded node, "Rate Limiting Operational Status" and "Rate Limiting Operational Reason" on "Diameter-> Maintenance->Egress Throttle Groups" are reported by SOAM with "UNK".

Changes

DSR Node was upgraded from 5.0.1-50.25.0 -> 6.0.2-60.37.0.

Cause

In DRL there are validity checks on EgressThrottleGrp values before storing them into RTDB The issue is EgressThrottleGrp value of rateAbateTime check failure at 6.0(Upgraded release) and not at 5.0 (Original release) which caused the CFG-DB failure issues.

Solution

There is a Bug 19115341-Incorporate recommendation from Egress Throttling tests: short term improvements.

As per the bug the value of DrlMinEtgAbateTime was changed from 200 (50.23) to 50 (50.25). But the merge to integration was done with (50.23) which doesn’t have this bug fix Similar bug fix has been done for 5.1 release Bug 19120288-Incorporate recommendation from Egress Throttling tests: short term improvements.

But this fix is not done for 6.0 Release which is why the upgrade release 6.0.2_60.37.0 does not have these changes.

DpiEgressThrottleGrp table values:

id=12 name=BSF_AH_00 birthTime=07/07/2016 13:13:52.000 rateAdminState=Enabled maxRate=100 rateOnsetThres1=85 rateOnsetThres2=90 rateOnsetThres3=95 rateAbateThres1=84 rateAbateThres2=89 rateAbateThres3=94 rateSmoothFactor=90 rateAbateTime=50 pendTransAdminState=Disabled maxPendTrans=0 pendTransOnsetThres1=0 pendTransOnsetThres2=0 pendTransOnsetThres3=0 pendTransAbateThres1=0 pendTransAbateThres2=0 pendTransAbateThres3=0 pendTransAbateTime=0 mcl=0

maxRate=100 rateOnsetThres1=85 rateAbateThres1=84 rateSmoothFactor=90 rateAbateTime=50 The check which doesn’t fail in 5.0 and fails in 6.0 is (rateAbateTime is less than DrlMinEtgAbateTime)

5.0

6.0

Workaround

As a workaround, the following needs to be done to make sure DRL accepts the ETG and SLDB and stop CFG-DB alarm wrt DRL ETG:

1. Go to Diameter -> Configuration -> Egress Throttle Groups -> [Edit]
2. Change rateAbateTime (Abatement Time) from 50 to 200 for EgressThrottle groups

References

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