Last Modified: Aug 19, 2026
Affected Product(s):
BIG-IP All
Known Affected Versions:
11.5.1, 11.5.1 hf1, 11.5.1 hf2, 11.5.1 hf3, 11.5.1 hf4, 11.5.1 hf5, 11.5.1 hf6, 11.5.1 hf7, 11.5.1 hf8, 11.5.1 hf9, 11.5.1 hf10, 11.5.1 hf11, 11.5.2, 11.5.2 hf1, 11.5.3, 11.5.3 hf1, 11.5.3 hf2, 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, 11.6.0, 11.6.0 hf1, 11.6.0 hf2, 11.6.0 hf3, 11.6.0 hf4, 11.6.0 hf5, 11.6.0 hf6, 11.6.0 hf7, 11.6.0 hf8, 11.6.1, 11.6.1 hf1, 11.6.1 hf2, 11.6.2, 11.6.2 hf1, 11.6.3, 11.6.3.1, 11.6.3.2, 11.6.3.3, 11.6.3.4, 11.6.4, 11.6.5, 11.6.5.1, 11.6.5.2, 11.6.5.3, 12.0.0, 12.0.0 hf1, 12.0.0 hf2, 12.0.0 hf3, 12.0.0 hf4, 12.1.0, 12.1.0 hf1, 12.1.0 hf2, 12.1.1, 12.1.1 hf1, 12.1.1 hf2
Fixed In:
13.0.0, 12.1.2
Opened: Sep 04, 2015 Severity: 4-Minor Related Article:
K30404012
Client sends a large ICMP Echo Request whose size exceeds the MTU of the network the packet traverses requiring the ICMP Echo Response to be fragmented. BIG-IP ignores the fragmentation request and continues sending ICMP Echo Replies that exceed the network MTU.
ICMP Echo Reply is not received by the requester.
-- A large (exceeds MTU of network traversed) ICMP Echo Request is directed to a Virtual Address on the BIG-IP system. -- ICMP Echo Reply is larger than upstream networks MTU resulting in fragmentation needed being sent to BIG-IP.
None.
Client now receives correctly ICMP echo response from Virtual Address when echo request has been fragmented.