Hi all, from some prior mail here I took it that you can have only one client non-root-squashed. Now in the manual , http://manual.lustre.org/manual/LustreManual16_HTML/LustreSecurity.html#50548870_pgfId-1292749 there is talk of multiple NIDs to be used here: "lctl conf_param Lustre-MDT0000.mdt.nosquash_lnets=[1,3]@elan0" I have a test cluster (running Lustre 1.6.6) where this command, albeit changed to ethernet addresses, does not work. Result is LNET_NID_ANY, as described in the manual for incorrect nosquash NID - my NIDs are formally correct and existing, of course. Btw, the command does not work in any case in this syntax variant "lctl conf_param NAME.mdt.nosquash_lnets", but it does with a single IP in the syntax provided earlier on this list: "lctl set_param mds.NAME.nosquash_nid". "lctl conf_param" does not work for setting the UID.GID mapping either. However, I''m mainly interested in the question of multiple NIDs. Is it wishful thinking of the manual, is it a matter of the Lustre version, or am I getting something entirely wrong? Thanks a lot, Thomas