Bug ID 652973: Coredump observed at system bootup time when many DHCP packets arrive

Last Modified: May 14, 2019

Bug Tracker

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

Known Affected Versions:
12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2, 12.1.2, 12.1.2 HF1, 12.1.2 HF2, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3

Fixed In:
13.1.0, 13.0.1, 12.1.3

Opened: Mar 23, 2017
Severity: 2-Critical

Symptoms

During system bootup, system coredump is observed when many DHCP packets arrive before system is fully ready and many flow entry creation failures are observed

Impact

System crash and coredump.

Conditions

-- BIG-IP DHCP proxy is in forwarding mode. -- DHCP relay agent in front of BIG-IP modifies giaddr field of DHCP packets to its own IP address. -- DHCP packets arrive during system bootup and before system is fully ready (i.e., some VLANs, interfaces and routes are not fully up).

Workaround

Make sure system has come up completely before sending DHCP packets to the system.

Fix Information

Coredump no longer occurs under these conditions.

Behavior Change