From db88bed93a21a4cc1554ba02b3e3bf296ea48571 Mon Sep 17 00:00:00 2001 From: abhishek Date: Sun, 24 Jul 2016 18:50:20 +0000 Subject: [PATCH] Add little documentation for DNS resolution of truncated packets. Closes #468 --- docs/refguide.xml | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/docs/refguide.xml b/docs/refguide.xml index 6b2be72c1..85d0720fd 100644 --- a/docs/refguide.xml +++ b/docs/refguide.xml @@ -999,6 +999,12 @@ Traceroute works by sending packets with a low TTL (time-to-live) in an attempt time with until you find one which works. + This option might not be honored if the DNS response + exceeds the size of a UDP packet. In such a situation our DNS + resolver will make the best effort to extract a response from the + truncated packet, and if not successful it will fall back to + using the system resolver. Also, responses that contain CNAME aliases + will fall back to the system resolver.