Bug ID 772233: IPv6 RTT metric is not set when using collection protocols DNS_DOT and DNS_REV.

Last Modified: Sep 13, 2023

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

Known Affected Versions:
13.1.1,,,,, 13.1.3,, 14.0.0,,,,,, 14.0.1,, 14.1.0,,,,,, 14.1.2,,,,, 15.0.0, 15.0.1,,

Fixed In:

Opened: Apr 12, 2019

Severity: 3-Major


When probing DNS Path, the metric round trip time (RTT) is not set correctly if the collection protocols used are NDS_DOT or DNS_REV. The problem occurs only if the Path involves an IPv6 address; IPv4 address works fine.


RTT metric is not set at all.


-- Path involves IPv6 addresses. -- Collection protocol used is either DNS_DOT or DNS_REV.


Use collection protocols - ICMP instead.

Fix Information

The problem for both collection protocols - DNS_DOT and DNS_REV no longer occurs, and the RTT is set correctly.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips