Bug ID 510409: NAT64 ICMP may fail with SP DAG and a small number of IPv4 addresses.

Last Modified: Sep 13, 2023

Affected Product(s):
BIG-IP CGN(all modules)

Known Affected Versions:
11.6.0, 11.6.1, 11.6.2, 11.6.3,,,,, 11.6.4, 11.6.5,,,, 12.1.0 HF1, 12.1.0 HF2, 12.1.1 HF1, 12.1.1 HF2, 12.1.2 HF1, 12.1.2 HF2

Fixed In:

Opened: Mar 03, 2015

Severity: 3-Major


ICMP requests from IPv6 clients are successfully translated and sent but the replies are dropped.


ICMP fails


A NAT64 enabled virtual server and SP DAG (cmp-hash set to src-ip or dst-ip) when there is a small number of IPv4 addresses available.


Increase the number of IPv4 addresses available for NAT64 translation.

Fix Information


Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips