Owlcatz the syntax is correct. I am not sure that monerod is working properly.
This is the monerod log:
2017-04-25 16:13:12.116 INFO global contrib/epee/src/mlog.cpp:145 New log categories: *:WARNING,net:FATAL,net.p2p:FATAL,net.cn:FATAL,global:INFO,verify:FATAL,stacktrace:INFO
2017-04-25 16:13:12.116 INFO global src/daemon/main.cpp:282 Monero 'Wolfram Warptangent' (v0.10.3.1-release)
2017-04-25 16:13:12.117 INFO global src/daemon/protocol.h:55 Initializing cryptonote protocol...
2017-04-25 16:13:12.117 INFO global src/daemon/protocol.h:60 Cryptonote protocol initialized OK
2017-04-25 16:13:12.117 INFO global src/daemon/p2p.h:63 Initializing p2p server...
2017-04-25 16:13:32.121 INFO global src/daemon/core.h:89 Deinitializing core...
2017-04-25 16:13:32.122 ERROR daemon src/daemon/core.h:94 Failed to deinitialize core...
2017-04-25 16:13:32.122 INFO global src/daemon/protocol.h:77 Stopping cryptonote protocol...
2017-04-25 16:13:32.122 INFO global src/daemon/protocol.h:81 Cryptonote protocol stopped successfully
2017-04-25 16:13:32.122 ERROR daemon src/daemon/main.cpp:290 Exception in main! Failed to initialize p2p server.
logout
[Process completed]
Strange, have you tried deleting the blockchain dir and resyncing? Are you using ssd or HD? Do you have a firewall installed preventing the p2p?