Manual Chapter : DNS application service alerts

Applies To:

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BIG-IQ Centralized Management

  • 8.2.0, 8.1.0, 8.0.0
Manual Chapter

DNS application service alerts

DNS application service alerts notify you when there are changes in metrics that can affect the overall performance of traffic over the network. When one or more of these thresholds are crossed, the health of your DNS application service will change. You can view alerts from the application service screen (
Applications
APPLICATIONS
<Application Name>
<DNS application service>
), or the general alerts screens (
Applications
ALERT MANAGEMENT
Active Alerts
or
Alert History
).
Metric Conditions
Alert
Description
Indication
Default Thresholds
Additional Data
RPS Dropped/Requests
The ratio of dropped requests, out of the total number of requests.
The request packet to a server pool member (virtual server) is dropped. This may be a configured, alternate load balancing method, or the pool member is unavailable.
Critical > 50%
Warning > 35%
Cleared < 35%
Select the
DNS RPS
in your application service's ANALYTICS area, to view the dropped requests over time. Use the dimensions to the right of the chart to identify if the issue is found on specific BIG-IP devices or DNS sync groups.
LBS Alternate/Requests
The ratio of alternate load balancing decisions applied to requests, out of the total number of requests.
Requests packets are sent to an alternate IP address (for the requested host) due to a client side timeout.
Critical > 65%
Warning > 90%
Cleared < 65%
Select the
DNS Load Balancing Decisions
in your application service's ANALYTICS area, to view trends in load balancing methods over time. Use the dimensions to the right of the chart to identify if the issue is found on specific BIG-IP devices or DNS sync groups.
LBS Fallback/Requests
The ratio of fallback load balancing decisions applied to requests, out of the total number of requests.
One or more servers is experiencing an outage, and request packets are directed to a failover server.
Critical > 50%
Warning > 25%
Cleared < 35%