Bug ID 985925: Ipv6 Routing Header processing not compatible as per Segments Left value.

Last Modified: Feb 03, 2023

Bug Tracker

Affected Product:  See more info
BIG-IP LTM(all modules)

Known Affected Versions:
14.1.0,,,,,, 14.1.2,,,,,,,,, 14.1.3,, 14.1.4,,,,,,, 14.1.5,,,, 15.0.0, 15.0.1,,,,, 15.1.0,,,,,, 15.1.1, 15.1.2,, 15.1.3,, 15.1.4,, 15.1.5,, 15.1.6,, 15.1.7, 15.1.8,, 16.0.0,, 16.0.1,,, 16.1.0, 16.1.1, 16.1.2,,, 16.1.3,,,

Opened: Jan 22, 2021
Severity: 3-Major


Packet should forward the packet with the route header unmodified when Segments Left is 0 (zero). It performs as expected when Segments Left is non-zero by dropping the packet and sending an ICMP error.


With Next Header field in IP header being Routing Header for IPv6, BIG-IP system fails to forward the ICMPv6 Echo Request packet to server, rather, it drops the packet.


-- An IPv6 packet whose Next Header in IP header is Routing Header IPv6. -- In the Routing Header IPv6 header, the Type field is 0. -- In the Routing Header IPv6 header, the Segment Left field is 0.



Fix Information


Behavior Change