Lantronix ETS Reference Manual - page 29
Concepts
TCP/IP
2-11
If your ETS has boot mode DHCP support, the ETS will attempt to acquire an IP address via DHCP at boot
time. If it succeeds, the ETS will save the IP address into NVR and continue with the boot process. Once
running, the ETS’s operational code will attempt to acquire the same IP address from the DHCP server. If
for some reason the runtime DHCP request fails (for example, if there is no response for 15 seconds), the
ETS will use the address saved in NVR.
If your ETS does not support DHCP at the boot level, you can still use DHCP at the operational level. To
enable DHCP in the runtime code, enter the Set/Define Server DHCP Enabled command and reboot the
server.
Note:
Enabling DHCP will remove the IP address saved in NVRAM, if there is one.
The ETS will use BOOTP or RARP to acquire an IP address at boot time, and then it will request an IP
address via DHCP once it is running. If the runtime DHCP request fails, the server will use the IP address
stored in NVRAM. If the DHCP request succeeds, the ETS will use the resulting IP address. It will not save
the IP address to NVRAM or overwrite the saved address (the one acquired by BOOTP or RARP).
If you enter a new IP address with the Set/Define Server IPaddress command, the ETS will assume that
you want to use that address in the future, and will disable DHCP.
Note:
When DHCP is used, the IP address saved in NVRAM will change each time the
ETS boots, and the List Server Bootparams command (which shows the
characteristics that will be in effect the next time the ETS boots) may show a
different IP address than the one that is currently in use.