Bug ID 719121: DHCP lease query fails to work when DHCP modes are switched from Relay to Forwarding or vice-versa.

Last Modified: Jun 10, 2021

Bug Tracker

Affected Product:  See more info
BIG-IP PEM(all modules)

Known Affected Versions:
13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1, 13.1.0, 13.1.0.1, 13.1.0.2, 13.1.0.3, 13.1.0.4, 13.1.0.5, 13.1.0.6, 13.1.0.7, 13.1.0.8, 13.1.1, 13.1.1.2, 13.1.1.3, 13.1.1.4, 13.1.1.5, 13.1.3, 13.1.3.1, 13.1.3.2, 13.1.3.3, 13.1.3.4, 13.1.3.5, 13.1.3.6, 13.1.4, 13.1.4.1, 14.0.0, 14.0.0.1, 14.0.0.2, 14.0.0.3, 14.0.0.4, 14.0.0.5, 14.0.1, 14.0.1.1, 14.1.0, 14.1.0.1, 14.1.0.2, 14.1.0.3, 14.1.0.5, 14.1.0.6, 14.1.2, 14.1.2.1, 14.1.2.2, 14.1.2.3, 14.1.2.4, 14.1.2.5, 14.1.2.6, 14.1.2.7, 14.1.2.8, 14.1.3, 14.1.3.1, 14.1.4, 14.1.4.1, 14.1.4.2, 14.1.4.3, 15.0.0, 15.0.1, 15.0.1.1, 15.0.1.2, 15.0.1.3, 15.0.1.4

Opened: May 08, 2018
Severity: 3-Major

Symptoms

The BIG-IP system does not process DHCP lease query replies from the server and fails after three retries when DHCP modes are switched from Relay to Forwarding or vice-versa.

Impact

Traffic-generated subscriber detection via DHCP Lease query fails.

Conditions

-- PEM configured with DHCP Lease Query enabled. -- DHCP mode switched from Relay to Forwarding or vice-versa, after a successful DHCP Lease query operation.

Workaround

Mitigation: Restart the TMM after switching from DHCP relay to forwarding mode or vice-versa. Note: When configured independently, DHCP in relay mode or forward mode works as expected.

Fix Information

None

Behavior Change