Last Modified: Jul 18, 2026
Affected Product(s):
BIG-IP LTM
Known Affected Versions:
11.5.4, 11.5.4 hf1, 11.5.4 hf2, 11.5.4 hf3, 11.5.4 hf4, 11.5.5, 11.5.6, 11.5.7, 11.5.8, 11.5.9, 11.5.10
Fixed In:
12.0.0, 11.6.3.3
Opened: Jul 31, 2015 Severity: 4-Minor
TCP sends IP fragments in spite of PMTU message.
IP fragmentation.
BIG-IP has received an ICMP PMTU message.
Set the MSS in the TCP profile sufficiently low to avoid inducing ICMP messages in the future.
Properly process ICMP packets.