perfSONAR User Q&A and Other Discussion

[Brian Candler <>]

When I have a maddash mesh which includes hostX.example.com and 
hostY.example.com, and there are only A records for those names, it runs 
tests over V4 fine.

But when the names have both A and AAAA records, the tests only run on 
IPv6; the IPv4 tests stop. This is seen from looking at the collected 
graphs at the /toolkit/ home page. The v4->v4 and v6->v6 graphs are both 
listed, but the v4->v4 data stops at the time the AAAA records were added.

(I do realise that the dashboard itself is going to have difficulty 
rendering a single traffic light where there are multiple data sources, 
so perhaps that's the underlying cause of this behaviour)

So my question is: is running a maddash where the same hostname has both 
A and AAAA records not supported? Does this mean I need to create 
separate v4 and v6 hostnames, *and* create two separate meshes (i.e. one 
between the v4 interfaces and one between the v6 interfaces?)  Or is 
this likely to be allowed in future?

I can give some sample URLs off-list if required.

Regards,

Brian Candler.

P.S. Running latest perfsonar; these boxes auto-updated to 3.5.1