Troubleshooting
Problem
A Tivoli Storage Manager server UPDATE DATAMOVER command is used to update the userid and password of a NAS machine for NDMP backups. The commands fails with ANR4728E and ANR1776I messages.
Symptom
The following messages are logged :
tsm: MYTSM>update datamover NASNAME userid=xxx password=yyy online=yes ANR4728E Server connection to file server 10.11.12.13 failed. Please check the attributes of the file server specified during definition of the datamover.
ANR1776I Data mover NASNAME has been updated, however a connection to the data mover failed. Please check the attributes of the file server specified in the update command.
Cause
NAS access list does not include ip address of tsm server incoming connection.
Diagnosing The Problem
A Tivoli Storage Manager server trace (SPI) will show trace entries similar to below
<timestamp> [639494][ndmpspi.c][943][spiTrace]: Attempting to connect to NDMP filer <NAS_ip_address> on port 10000 as user: NDMP_Admin.
<timestamp> [639494][../../unix/ndmpconn.c][396][spiTrace]: Begin polling ....
<timestamp> [639494][ndnotify.c][100][spiTrace]: Received NDMP_NOTIFY_CONNECTED message .
<timestamp> [639494][ndnotify.c][123][spiTrace]: CONNECT: Connection refused, Reason: Connection refused..
Examine the NAS filer event log (/etc/messages) for errors. For example :
<timestamp> [NASNAME: pac.access:info]: ndmpd: Access Denied from if = e0M, source IP = 10.11.12.20, destination IP = 10.11.12.13. Check options ndmpd.access, if desired.
Resolving The Problem
In the above messages, the access is denied because the source ip address, 10.11.12.20, is not allowed to connect to the destination address, 10.11.12.13.
Verify the host list in the filer options. For example :
Filer Options :
ndmpd.access host=10.11.12.30,10.11.12.40
ndmpd.authtype plaintext,challenge
ndmpd.connectlog.enabled off
ndmpd.enable on
ndmpd.ignore_ctime.enabled off
ndmpd.offset_map.enable on
ndmpd.password_length 16
ndmpd.preferred_interface disable (value might be overwritten in takeover)
ndmpd.tcpnodelay.enable off
In this example, the the source ip address, 10.11.12.20, is not listed in the ndmpd.access option. Update the option to include the source ip address. For example :
options ndmpd.access host=10.11.12.20
Once the ip address is added, re-run the UPDATE DATAMOVER command.
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Document Information
Modified date:
17 June 2018
UID
swg21638718