Bug ID 693098: IKEv1 logging 'No need for ISAKMP mode config' event

Last Modified: Jun 10, 2021

Bug Tracker

Affected Product:  See more info
BIG-IP TMOS(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, 12.1.3,,,,,,,, 12.1.4,, 12.1.5,,,, 12.1.6, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1, 13.1.0,,,,,,,,, 13.1.1,,,,, 13.1.3,,,,,,, 13.1.4,

Fixed In:

Opened: Nov 06, 2017
Severity: 3-Major


An unnecessary and distracting log line appears in /var/log/ltm when a IKEv1 security association is negotiated: No need for ISAKMP mode config. This is an internal mechanism related to dynamic IP address allocation at negotiation time, which the BIG-IP system does not support.


No impact beyond the message in /var/log/ltm for each SA negotiated.


When a remote peer is configured for IKEv1.



Fix Information

IKEv1 no longer sends the event involved, because the system does not depend on this event.

Behavior Change