Bug ID 1690721: Bgpd crashes on `write` config or running show running-config CLI, when trying to delete neighbor with wrong peer-group

Last Modified: Jan 17, 2026

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

Known Affected Versions:
15.1.10.5, 15.1.10.6, 15.1.10.7, 15.1.10.8, 16.1.5.1, 16.1.5.2, 16.1.6, 16.1.6.1, 17.1.2, 17.1.2.1, 17.1.2.2, 17.1.3, 17.5.0, 17.5.1, 17.5.1.2, 17.5.1.3, 21.0.0

Opened: Oct 04, 2024

Severity: 3-Major

Symptoms

If you delete a neighbor with the wrong peer-group and save the config, bgpd will crash.

Impact

Bgpd crashes. Routing may be affected while bgpd restarts.

Conditions

-- Try deleting the bgp neighbor with wrong peer-group -- Save the config by doing 'write' or run the 'show running-configuration CLI.

Workaround

While deleting the neighbor give the right peer-group.

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips