[lustre-discuss] lctl ping issue on 2.7.19

john casu john at chiraldynamics.com
Sat Nov 11 07:37:26 PST 2017

Have a bizarre issue, where I can lctl ping between clients and lctl ping between servers
but cannot ping between a client and a server.

on my server, I see the following error that seems to explain the issue:
Nov 10 09:19:01 mds1 kernel: LNet: 328:0:(o2iblnd_cb.c:2343:kiblnd_passive_connect()) Can't accept conn from at o2ib 
(version 12): max_frags 256 too large (32 wanted)

Does anyone have any advice on how to simply resolve this?

I'm running 3.10.0-514.10.2.el7_lustre.x86_64 on the server (centos 7.2 base) and
3.10.0-514.10.2.el7_lustre.x86_64 on the client (centos 7.3 base)
also using built in IB drivers.

-john c.

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