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VLAN tagging and the VIOS: some questions and answers.
Here are some questions I received recently regarding VLAN
tagging on the VIO server. My answers are shown in green . “Hi Chris, Q: I’m trying to
understand when, where and why there would be the need to use ‘mkvdev –vlan
(etc.) on the VIOS, and I’m wondering whether you would be able to clarify this
for me, please. Is it necessary to add
the VLAN tag devices to the SEA, or is it suffice to just have them defined
within the Virtual Ethernet itself which is part of the SEA?” A:
It is suffice to simply define the VLAN ids assigned... [More]
Tags: tagging ent6 sea virt_adapters=ent3 vlan power7 hmc tag -attr mkvdev ent5 -dev -vlan chdev dynamic dlpar |
Does AIX support passwords longer than 8 characters? Yes!
Prior to AIX 5.3 TL7 and AIX 6.1,
there was an 8 character limit on AIX user passwords. If you need passwords of
greater than 8 characters then you must enable one of the supplied Loadable
Password Algorithms (LPAs). The following table lists the available algorithms
and the limitations of each: For example, to enable the MD5 algorithm
I can modify /etc/security/login.cfg file with the chsec command as follows:
# chsec -f
/etc/security/login.cfg -s usw -a pwd_algorithm=smd5 # tail -2
/etc/security/login.cfg
... [More]
Tags: /etc/security/pwdalg.cfg characters smd5 pwd_algorithm /usr/lib/security/smd5 aix /etc/security/login.cfg support 8 gibson clpasswd chris greater than for passwords |
Managing users with dsh and chpasswd - (plus info on DSM and dping).
Starting with AIX 7.1, CSM is no
longer supported or available. It has been replaced by Distributed Systems
Managment (DSM). Section 5.2 of the IBM AIX 7.1 Differences Guide Redbook provides
details of the new DSM capabilities.
Fortunately DSM still provides access
to the dsh command. I’ve written about how I’ve used this utility
in the past . The new dsh command (and other tools) are
provided in the new DSM filesets named dsm.core and dsm.dsh . root@nim# lslpp -L dsm*
Fileset
Level State Type... [More]
Tags: run remote if exit installed pwdadm a accepted. expired code dping has csm been not aix you have license had dsh shell -l new admchg release csmconfig 255 2651-095 or chpasswd |
More NIM troubleshooting....some basics...
It’s no secret that I like
NIM. I’ve written about NIM on several occasions, in Redbooks, technical
articles and on my blog. It’s a great tool for installing and maintaining AIX. Occasionally
though, it can throw you an unusual error or two when things go wrong. For the uninitiated
resolving these errors can be challenging. Here’s a couple of NIM
related questions I received recently. Both are troubleshooting queries. “I'm getting the following error when trying
to create a NIM lpp_source for AIX 6.1” : ... [More]
Tags: resource to filesystem m_mk_lpp_source: oslevel space failed all a check "master" 0042-185 on already nim copy due not exists aix instfix c_ch_nfsexp: rest or permissions link filesets nfs 0042-081 found. for /etc/.tmp.nim.exports export were and |
PowerHA: lssrc and clinfoES
So you’re configuring
a new PowerHA 6.1 cluster and you
decide to check if the clinfoES subsystem is running. You run the following command: #
lssrc -a | grep cluster clstrmgrES
cluster
2883628 active Hmmm, clinfoES is not listed. To ensure that
is clinfoES is shown in lssrc output, in both inactive and
active states, run the following command on all nodes in the cluster: #
chssys -s clinfoES –d And now clinfoES is shown: #lssrc
-a | grep cluster clstrmgrES
cluster
2883628 active... [More]
Tags: inactive -d aix output chris_gibson hacmp appearing when powerha clinfoes chssys lssrc in not clstrmgres -s |
