During this morning's h1susex remote power cycle I discovered that h1susey's management port was not working. I did the following to diagnose and fix it:

1. @EY, check mgt eth port on h1susey [OK, LINK LIGHT]
2. @EY, check sw-ey-h1fe port 3 [OK, LINK LIGHT]
3. root@h1susey, check IPMI ethernet settings [OK]
4. admin@sw-ey-h1fe check port 3 settings [OK]
5. root@h1susey, cold restart the management board controller [FIXED THE PROBLEM]

No idea why the mgt board gummed up like this, with link lights on the ethernet port but no service, but luckily a cold reset fixed it.