Symptoms
When hosts send ICMP unreachable error messages and processed by the BIG-IP system, subsequent good UDP packets do not get the persistence LSN translation address.
Impact
LSN persistence issues. UDP packets from the same client IP address may not get the same translation address every time, even though there exists a persistence entry in the table
Conditions
-- Virtual server with FW NAT or CGNAT configuration to accept UDP traffic.
-- Client or/and server randomly sends ICMP unreachable messages.
Fix Information
Processing ICMP unreachable packets no longer causes FWNAT/CGNAT persistence issues with UDP traffic.
