This is what my MacBook's console has to say, when the ethernet cable is plugged in:
8/8/15 12:49:49,000 pm kernel[0]: Ethernet [AppleBCM5701Ethernet]: Link up on en0, 1-Gigabit, Full-duplex, No flow-control, Debug [796d,0301,0de1,0300,c1e1,3800]
8/8/15 12:50:17,839 pm configd[52]: network changed: Proxy
8/8/15 12:50:17,922 pm com.apple.SecurityServer[83]: Killing auth hosts
8/8/15 12:50:17,922 pm com.apple.SecurityServer[83]: Session 100032 destroyed
8/8/15 12:50:17,922 pm logind[98]: -[SessionManager getClient:withRole:inAuditSession:]:241: ERROR: No session dictionary for audit session 100034
8/8/15 12:50:17,922 pm logind[98]: _SMGetSessionAgent:73: ERROR: __SMGetClientForAuditSessionAgent failed 2
8/8/15 12:50:17,923 pm IMRemoteURLConnectionAgent[3663]: SACShieldWindowShowing:925: ERROR: NULL response
8/8/15 12:50:17,924 pm imagent[312]: [Warning] Bag loading failed! Error (NSURLErrorDomain:-1009): The Internet connection appears to be offline. http://init-p01md.apple.com/bag
8/8/15 12:50:22,926 pm com.apple.geod[453]: 2015-08-08 12:50:22.925, 453, 9160bb50, [CountryConfiguration]: Could not determine current country code: Error Domain=NSURLErrorDomain Code=-1009 "The Internet connection appears to be offline." UserInfo=0x7fdb9170b310 {NSUnderlyingError=0x7fdb917205f0 "The Internet connection appears to be offline.", NSErrorFailingURLStringKey=http://gsp1.apple.com/pep/gcc, NSErrorFailingURLKey=http://gsp1.apple.com/pep/gcc, _kCFStreamErrorDomainKey=12, _kCFStreamErrorCodeKey=8, NSLocalizedDescription=The Internet connection appears to be offline.}
8/8/15 12:50:23,123 pm locationd[85]: Location icon should now be in state 'Active'
8/8/15 12:50:24,529 pm locationd[85]: NETWORK: requery, 0, 0, 0, 0, 3, items, fQueryRetries, 0, fLastRetryTimestamp, 460723407.5
8/8/15 12:50:24,581 pm locationd[85]: NETWORK: no response from server, reachability, 2, queryRetries, 0
8/8/15 12:50:39,671 pm locationd[85]: NETWORK: requery, 0, 0, 0, 0, 3, items, fQueryRetries, 1, fLastRetryTimestamp, 460723824.5
8/8/15 12:50:39,721 pm locationd[85]: NETWORK: no response from server, reachability, 2, queryRetries, 1
8/8/15 12:52:11,182 pm networkd[172]: +[NETLedBelly stopFastFail] Clearing ledbelly failure cache
8/8/15 12:52:11,184 pm configd[52]: network changed: v4(en0+:129.242.212.68) DNS+ Proxy+ SMB
8/8/15 12:52:11,275 pm logind[98]: -[SessionManager getClient:withRole:inAuditSession:]:241: ERROR: No session dictionary for audit session 100035
8/8/15 12:52:11,275 pm logind[98]: _SMGetSessionAgent:73: ERROR: __SMGetClientForAuditSessionAgent failed 2
8/8/15 12:52:11,275 pm IMRemoteURLConnectionAgent[3742]: SACShieldWindowShowing:925: ERROR: NULL response
8/8/15 12:52:11,279 pm imagent[312]: [Warning] IDSiMessageServerBag: Invalid dictionary to parse URL bag ((null))
8/8/15 12:52:11,880 pm locationd[85]: NETWORK: requery, 0, 0, 0, 0, 3, items, fQueryRetries, 2, fLastRetryTimestamp, 460723839.7
8/8/15 12:52:12,244 pm configd[52]: setting hostname to "tunvn-sby-qtine-68.studentby.uit.no"