Manual Chapter :
DNS application service alerts
Applies To:
Show Versions
BIG-IQ Centralized Management
- 8.3.0, 8.2.0, 8.1.0, 8.0.0
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 (), or the general alerts screens ( or
Alert
History
).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% |
