Dell PowerVault NX3500 Administrator's Guide - Page 165

NFS Mount Fails Due to Netgroup Failure, con d to use the same directory server

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NFS Mount Fails Due to Netgroup Failure Description Cause Workaround This event is issued when client fails to mount an NFS export because the required netgroup information cannot be attained. This error is usually the outcome of a communication error between the NAS system and the NIS/LDAP server. It can be a result of network issue, directory server overload, or a software malfunction. Repeat the below process for each configured NIS server, each time leaving just a single NIS used, starting with the problematic NIS server. 1 Inspect the NIS/LDAP server logs and see if the reason for the error is reported in the logs. 2 Network test: a Try pinging the NAS from a client located in the same subnet as the NIS/LDAP server. b Try pinging the NIS/LDAP server from a client located in the same subnet as the NAS. If a packet loss is evident on one of the above, resolve the network issues in the environment. 3 Using a Linux client located in the same subnet as the NAS and configured to use the same directory server, query the netgroup details from the NIS/LDAP server using the relevant commands. Ensure that the reply is received in a timely manner (up to 3 seconds). You can temporarily workaround the problem by removing the netgroup restriction on the export and/or by defining an alternative directory server. Identify the relevant export and the options defined for while focusing on the netgroup definition. Document the used netgroup in order to restore it once the issue is solved and remove the netgroup limitation. Troubleshooting 165

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Troubleshooting
165
NFS Mount Fails Due to Netgroup Failure
Description
This event is issued when client fails to mount an NFS export
because the required netgroup information cannot be attained.
Cause
This error is usually the outcome of a communication error
between the NAS system and the NIS/LDAP server. It can be a
result of network issue, directory server overload, or a software
malfunction.
Workaround
Repeat the below process for each configured NIS server, each time
leaving just a single NIS used, starting with the problematic NIS
server.
1
Inspect the NIS/LDAP server logs and see if the reason for the
error is reported in the logs.
2
Network test:
a
Try pinging the NAS from a client located in the same subnet as
the NIS/LDAP server.
b
Try pinging the NIS/LDAP server from a client located in the
same subnet as the NAS.
If a packet loss is evident on one of the above, resolve the network
issues in the environment.
3
Using a Linux client located in the same subnet as the NAS and
configured to use the same directory server, query the netgroup
details from the NIS/LDAP server using the relevant commands.
Ensure that the reply is received in a timely manner (up to 3
seconds).
You can temporarily workaround the problem by removing the
netgroup restriction on the export and/or by defining an alternative
directory server.
Identify the relevant export and the options defined for while
focusing on the netgroup definition. Document the used netgroup
in order to restore it once the issue is solved and remove the
netgroup limitation.