Quick: SNMP in Server Core 2008 R2
Installing SNMP in Server Core 2008 R2 is really simple, as many blogs and guides will have already told you all you need to do is run this command:
start /w ocsetup SNMP-SC
From there though, how on earth do you configure it? You’ll note that if you use the Server Manager or MMC to bring up the properties of the service that all the ones you want aren’t there:
That’s not helpful at all! A few blogs, including this one have pointed out that you can do a registry dump from a GUI-based install and that works fine, but for me that didn’t seem clean enough.
Well, I’ve sussed it, with the help of this Trainsignal article and their phrasing of:
Also, after installing SNMP in Server 2008, the SNMP option tabs will not show up until you have logged off and logged back on again. So, you won’t be able to configure anything until after you log back in. This has caused a fair amount of confusion in the field.
For Windows 7, Install the SNMP Management Tools (from Control Panel, Programs and Features): 
Once you’ve done this you’ll need to log off and back on again and then when you open the dialogue box as before (via MMC or Server Manager) you’ll have all the fields.
For Windows 2003 and XP you can kind of see them anyway (on my system this yields a funny message, although seems to work).