5.2.20.2 EgressRequestRateLimitDropAbove25Percent

Table 5-99 EgressRequestRateLimitDropAbove25Percent

Field Details
Trigger Condition If a request is dropped due to the tokens in the bucket are exhausted and drop rate per PLMN is detected above 25 percent of total transactions of that PLMN, oc_ingressgateway_plmn_egress_ratelimit_total metric will be pegged and corresponding alert will be raised.
Severity Major
Alert Details Provided

Summary

Egress Rate Limiting Request Drop Rate detected per PLMN above 25 Percent of Total Transactions
Expression:
sum(rate(oc_ingressgateway_plmn_egress_ratelimit_total{namespace="sepp-namespace",Status="ERL_MATCH_NO_TOKEN_LOW_PRI_REJECT"}[5m])) by (EgressRateLimitList,PLMN_ID,namespace)/sum(rate(oc_ingressgateway_plmn_egress_ratelimit_total{namespace="sepp-namespace"}[5m])) by (EgressRateLimitList,PLMN_ID,namespace) *100 >= 25 < 50
OID 1.3.6.1.4.1.323.5.3.46.1.2.4040
Metric Name oc_ingressgateway_plmn_egress_ratelimit_total
Resolution The alerts gets cleared when the count goes down.
Possible resolutions:
  1. If the traffic is being forwarded even if tokens for the Egress Rate Limiting List are exhausted, do the following:
    1. Verify the 3gpp-Sbi-Message-Priority header of the request. If the priority in the header is less than Discard Message Priority property of the message in the Egress Rate Limiting List, then the message is not dropped.
    2. If the 3gpp-Sbi-Message-Priority header is not present, then the priority is checked in the route configuration. If a value for 3gpp-Sbi-Message-Priority is present in the route configuration, then the above mentioned condition is considered and the same solution is applied.
    3. If the priority is unknown for the request, 24 is considered as the default value for the request priority, then, the same condition as above is applied. 2. For further details and configuration related issues, please <refer troubleshooting>
  2. For all configuration related and additional information, refer ' Rate Limiting for Egress Roaming Signaling per PLMN feature' section in the Oracle Communications Cloud Native Core, Security Edge Protection Proxy Troubleshooting Guide.