Bug ID 756817: ZebOS addresses blocks do not reflect RFC5735 changes to reserved address blocks.

Last Modified: Jul 12, 2023

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

Known Affected Versions:
14.1.0,,,,,, 14.1.2,,,,,,,,, 14.1.3,, 14.1.4, 15.0.0, 15.0.1,,,

Fixed In:

Opened: Jan 28, 2019

Severity: 3-Major


Special IP address handling as per RFC6890 is done correctly in the routing protocols. There is a possibility of martian addresses getting announced or allowed addresses restricted (e.g., and This impacts all components using dynamic routing.


Martian addresses are allowed. Non-martian addresses are blocked.


-- Network advertisements in BGP, etc., allow martian addresses and restrict allowed network-space as per RFC6890, for example, and, are blocked. -- In IPv6 loopback addressed are allowed, so ::/128 (unspec) and ::1/128 (loopback) addresses are allowed. -- Some DSlite address ranges are not handled correctly.



Fix Information

Ensure that martian addresses like IPv6 (::/128 - unspec, ::1/128 - loopback) are not used. Note: Although,, are no longer martian addresses, they still cannot be used.

Behavior Change

Guides & references

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