No - the :0 and :1 address are floating addresses *assigned by CES* - it created those interfaces. The issue seems to be that these are assigned and CES doesn't know it. Bob Oesterlin Sr Storage Engineer, Nuance HPC Grid From: <gpfsug-discuss-bounces at spectrumscale.org> on behalf of Olaf Weiser <olaf.weiser at de.ibm.com> Reply-To: gpfsug main discussion list <gpfsug-discuss at spectrumscale.org> Date: Monday, October 17, 2016 at 1:53 PM To: gpfsug main discussion list <gpfsug-discuss at spectrumscale.org> Subject: [EXTERNAL] Re: [gpfsug-discuss] CES: IP address won't assign: "handleNetworkProblem with lock held" ah .. I see.. seems, that you already has IP aliases around .. GPFS don't like it... eg. your node tct-gw01.infra.us.grid.nuance.com: inet 10.30.22.160/24 has already an alias - 10.30.22.176 ... if I understand you answers correctly... from the doc'... [...] you need to provide a static IP adress, that is not already[...] as an alias [...] -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://gpfsug.org/pipermail/gpfsug-discuss_gpfsug.org/attachments/20161017/97700840/attachment.html>