Last Modified: Apr 28, 2025
Affected Product(s):
BIG-IP LTM
Known Affected Versions:
11.3.0, 11.4.0
Fixed In:
11.5.0
Opened: Aug 28, 2013 Severity: 3-Major Related Article:
K14796
TCP traffic from a FTP monitor intermittently picks the wrong source address for the egress interface if the pool member being monitored is located on a network served by ECMP routes. This causes FTP monitor to report false failures.
FTP monitors may intermittently report available pool member(s) as not available in a false failure.
FTP monitor is configured to monitor pool members that are accessible through ECMP routes from the BIG-IP.
Allow asymmetric routing by disabling VLAN keyed connections - 'tmsh modify sys db connection.vlankeyed value Disable'
Monitors now send traffic using the correct source address for the egress interface and do not falsely mark available pool members as down.