To update the ELOM IP address on a Sun Fire x2100 M2 via ssh, you can do the following:
set /SP/AgentInfo DhcpConfigured=disable
set /SP/AgentInfo NetMask=
set /SP/AgentInfo Gateway=
set /SP/AgentInfo IpAddress=
If necessary, you can connect the server’s net management port to a laptop using a crossover cable.