Bug ID 1322413: FQDN node status changes to Unknown/Unchecked on peer device after config sync

Last Modified: Jul 11, 2024

Affected Product(s):
BIG-IP LTM(all modules)

Known Affected Versions:
14.1.5.1, 14.1.5.2, 14.1.5.3, 14.1.5.4, 14.1.5.6, 15.1.7, 15.1.8, 15.1.8.1, 15.1.8.2, 15.1.9, 15.1.9.1, 15.1.10, 15.1.10.2, 15.1.10.3, 15.1.10.4, 16.1.0, 16.1.1, 16.1.2, 16.1.2.1, 16.1.2.2, 16.1.3, 16.1.3.1, 16.1.3.2, 16.1.3.3, 16.1.3.4, 16.1.3.5, 16.1.4, 16.1.4.1, 16.1.4.2, 16.1.4.3, 17.0.0.1, 17.0.0.2, 17.1.0, 17.1.0.1, 17.1.0.2, 17.1.0.3, 17.1.1, 17.1.1.1, 17.1.1.2, 17.1.1.3

Opened: Jul 20, 2023

Severity: 3-Major

Symptoms

If changes are made to the configuration of an FQDN node which has a node monitor configured, and the configuration is synced to a device group, ephemeral nodes generated from the FQDN node may show an Availability of "unknown" and a Monitor Status of "unchecked".

Impact

The affected nodes will be displayed with an Availability of "unknown" and a Monitor Status of "unchecked".

Conditions

This may occur on versions of BIG-IP with fixes for ID724824 and ID1006157, under the following conditions: -- BIG-IP systems are configured in a device group -- The device group is configured for Manual Sync (Full or Incremental) -- One or more FQDN nodes are configured with a node monitor (which could be the Default Node Monitor) -- A change is made to the configuration of the FQDN node -- A Full configuration sync is performed (by a Manual sync with the device group configured for a Full sync, or using the "force-full-load-push" keyword: tmsh run cm config-sync to-group example-group force-full-load-push

Workaround

To recover from this condition, remove and re-add the node monitor: -- Remove the node monitor from the FQDN node configuration (or from default-node-monitor): tmsh mod ltm node example monitor none (tmsh mod ltm default-node-monitor rule none) -- Sync this change to the device group (Incremental sync) -- Re-add the node monitor to the FQDN node configuration (or to default-node-monitor): tmsh mod ltm node example monitor my_node_monitor (tmsh mod ltm default-node-monitor rule my_node_monitor) -- Sync this change to the device group (Incremental sync)

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips