I ask this question months ago，but I was told IPv6 is supported in mpich 3.*. So it's not supported?

Thanks

Shuwei

On Wed, 6 Dec 2017 at 11:24 Guo, Yanfei <yguo@anl.gov> wrote:

Hi Carlos,

MPICH currently uses gethostbyname which does not support IPv6, therefore it won’t work on a pure IPv6 network.

Best,

Yanfei Guo
Assistant Computer Scientist
MCS Division, ANL

On 11/22/17, 2:23 PM, "Carlos" <carlos@inf.ufpr.br> wrote:

Is it possible to use mpich (3.3) with IPv6-only? We tried it here and got

Fatal error in MPI_Init: Other MPI error, error stack:
MPIR_Init_thread(506)..............:
MPID_Init(211).....................: channel initialization failed
MPIDI_CH3_Init(89).................:
MPID_nem_init(324).................:
MPID_nem_tcp_init(178).............:
MPID_nem_tcp_get_business_card(425):
ckpt_restart(384)..................: gethostbyname failed, zuratkul (errno 4)
*************

This shows that mpich doesn't run without IPv4, which is our case... Is there a
way to make it work in this situation?
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