Bug ID 476736: APM IPv6 Network Access connection may fail in some cases

Last Modified: Nov 07, 2022

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

Known Affected Versions:
11.4.0, 11.4.1, 11.5.1, 11.5.1 HF1, 11.5.1 HF10, 11.5.1 HF11, 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, 11.5.10, 11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3

Fixed In:
12.0.0, 11.6.0 HF4, 11.5.2, 11.4.1 HF9

Opened: Aug 25, 2014

Severity: 2-Critical


When the client provided link local address contains zeros for first 4+ bytes, the IPv6 Network Access connection will fail due to listener bind failure.


IPv6 Network Access Tunnels may not succeed.


When the first 4+ bytes of IPv6 Link Local address are zeros this bug will show up.


There is no workaround for this.

Fix Information

For a certain set of IPv6 link local addresses, the IPv6 Network Access tunnel may not succeed due to listener lookup failure. This code change fixes this issue.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips