Last Modified: Jun 19, 2025
Affected Product(s):
BIG-IP LTM
Known Affected Versions:
17.1.0, 17.1.0.1, 17.1.0.2, 17.1.0.3, 17.1.1, 17.1.1.1, 17.1.1.2, 17.1.1.3, 17.1.1.4, 17.1.2, 17.1.2.1, 17.1.2.2
Opened: Nov 05, 2024 Severity: 3-Major
When using a transparent vlan-group with long-lasting UDP connection traversing between vlans in vlan-group. It was noticed that when failover happens on an upstream device (not F5) and the MAC address for the destination IP changes, BIG-IP does not update its destination MAC on the existing flow.
UDP traffic will impact.
1) Configure a transparent vlan-group 2) Don't configure any Virtual Server 3) send the udp traffic.
Delete the connection on BIG-IP: delete sys connection cs-client-addr x.x.x.x cs-server-addr x.x.x.x
None