Bug ID 573529: F-bit is not set in IPv6 OSPF Type-7 LSAs

Last Modified: Nov 07, 2022

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

Known Affected Versions:
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, 11.5.2, 11.5.2 HF1, 11.5.3, 11.5.3 HF1, 11.5.3 HF2, 11.5.4, 11.5.4 HF1

Fixed In:
11.5.4 HF2

Opened: Feb 12, 2016

Severity: 3-Major


The forwarding address and the F-bit are not set in Type-7 LSAs sent out by the ASBR.


ABR routers are not able to propagate NSSA routes to other OSPF areas as External Type-5 routes. As a result, OSPF areas cannot reach external networks.


Virtual IP from a virtual server is redistributed as a Type-7 route by the ASBR.



Fix Information

ASBR sets the F-bit and forwarding address correctly.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips