Last Modified: May 31, 2019
See more info
Known Affected Versions:
12.1.2, 12.0.0, 11.6.1, 11.6.0, 11.5.4, 11.5.2, 11.5.1, 11.5.0, 11.4.1
Opened: Sep 23, 2014
Related AskF5 Article: K40120584
[GTM] Move address from one HA redundant LTM to another could cause BIG-IP monitor failure.
Only one of the redundant LTM systems get probed. If the probed LTM is standby, it ignores the probe request. Available BIG-IP redundant LTM server is marked down; the monitor does not work, and all hosted virtual servers are marked down.
BIG-IP redundant LTM server configuration with one address at 'Address List' and another at 'Peer Address List', one of the addresses is moved from another.
In the GUI, delete the address from either the "Address List" or "Peer Address List" and click "Update". Then add the address to the other field and click "Update".