LAVA Computer MFG Inc. eSynC Product Family - Reference Manual – C03
2 Vulcan St. Toronto, ON
Tel: +1 416 674-5942
www.lavalink.com
Canada, M9W 1L2
Toll Free (US & Canada): 800 241-5282
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Network Recovery Operation
The eSynC products and the LTM application help a tablet or mobile phone recover from
failures to establish a network connection when using a wired network connection. The typical
failure is due to the inability to establish a network address from a DHCP server.
When a DHCP lookup or lease renewal fails, the device turns off the Ethernet interface and
makes no further attempts. In a typical situation, the user would go to the configuration menu
and enable Ethernet to restart the connection. The alternative is to unplug the network cable and
plug it in again to reset the connection. Until the process is restarted, the device has lost the
wired network connection. The DHCP behavior is a serious issue for an enclosure-based system.
There is no software-only solution for a non-rooted device.
The LTM application monitors the wired network connection. If the connection is lost, LTM
automatically restarts the Ethernet hardware to establish a connection.
When a reset takes place the Android Toast message “LTM – RESET ETHERNET” is reported.
The initial restart takes place if no network connection is seen for about 1 minute. If the
connection is not restored, repeated attempts are made until a connection is restored. There are
two options for the handling of subsequent attempts. Option 1 gradually backs off the time-out
used. The timeouts are 2, 3, 5, and 8 minutes. After the first three reset attempts, subsequent
attempts are made every 8 minutes. Option 2 repeats subsequent attempts every 2 minutes.
If the Network Recovery feature is not desired, it can be disabled using the “dhcp-recovery=0”
command in the LTM configuration.
