Bug ID 726058: DHCP in forwarding mode decrements the received DHCP client side IP TTL prior to forwarding the packets towards the DHCP server

Last Modified: Sep 06, 2019

Bug Tracker

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

Known Affected Versions:
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, 13.1.1.1, 13.1.1.2, 13.1.1.3, 13.1.1.4, 13.1.1.5, 13.1.3, 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, 14.1.0, 14.1.0.1, 14.1.0.2, 14.1.0.3, 14.1.0.4, 14.1.0.5, 14.1.0.6, 14.1.2, 15.0.0, 15.0.1

Opened: Jun 28, 2018
Severity: 3-Major

Symptoms

DHCP packet dropped by the DHCP relay agent after the BIG-IP system, if the DHCP clientside packet received by the BIG-IP system has a TTL of 1.

Impact

Loss of DHCP service via the BIG-IP system.

Conditions

-- BIG-IP system configured as a DHCP forwarder. -- DHCP client side packet received with a TTL of 1.

Workaround

To mitigate this issue, have the DHCP client send a DHCP request with an IP TTL greater than or equal to 2.

Fix Information

None

Behavior Change