Solving Problems With Discovery; Discovery And Policy Updates Running Slowly; Discoveries Frequently Time Out; Some Printers On The Network Cannot Be Discovered - Lexmark C792 Administrator's Manual

Troubleshooting
3
Select the tasks that do not respond, and then click Stop Task.

Solving problems with discovery

Discovery and policy updates running slowly

1
Check your proxy, firewall, and other network settings on LDD components to make sure all necessary
communication is allowed.
2
Make sure other network traffic is not reducing bandwidth during discoveries and policy updates.
3
If you have three or more servers in your system, then try reducing the chunk size using the General service on the
Services tab. A value as low as 2 may improve performance.
4
To reduce the time waiting for non‑responsive printers during policy updates, reduce the timeout per device using
the PolicyUpdate service on the Services tab.
Note: If you are deploying solutions that include large eSF applications or several eSF applications, then a lower
setting may not allow enough time to successfully validate eSF application deployment.
5
If you are discovering printers for subsequently added discovery profiles in a device group or groups in which you
have previously discovered printers, then select Discover new devices only to skip any IP address where a printer
has been discovered.

Discoveries frequently time out

1
Check your proxy, firewall, and other network settings on LDD components to make sure all necessary
communication is allowed.
2
Make sure other network traffic is not reducing bandwidth during discoveries and policy updates.
3
If you have three or more servers in your system, then try increasing the initial timeout and retry times using the
NPA service on the Services tab. Type a timeout period in milliseconds for each retry in sequence, separating each
by a space in the NPANT Timeout field.

Some printers on the network cannot be discovered

1
Check your proxy, firewall, and other network settings on LDD components to make sure all necessary
communication is allowed.
2
From the Services tab, make sure the read community name and write community name for the SNMP service
match the printers on the network. All printers used in the LDD system must use the same read community name
and write community name.
3
From the Device Groups tab, make sure the discovery profile settings of the discovery profile are correct. For more
information, see "Discovering printers" on page 98.
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