The links should be back up again.
That was painful, and I appear to have killed a network card in the process... Yay!
Code:
[ 184.174745] enp2s0: hw csum failure
[ 184.174749] CPU: 0 PID: 0 Comm: swapper/0 Tainted: P O 3.12.6-niluje #1
[ 184.174750] Hardware name: System manufacturer P5Q-E/P5Q-E, BIOS 2101 04/06/2009
[ 184.174751] e013e600 c148b2cd 00000000 c14063bc b4134bec e013e600 00002600 c144bb97
[ 184.174754] f5803220 00000000 1c1f4143 c143414a f59b0a18 c15ebf00 da6df1ce 00000108
[ 184.174757] 346aea6d 00000020 3200a8c0 0000ce31 00000003 e013e600 c14e7514 c15ebf00
[ 184.174760] Call Trace:
[ 184.174764] [<c148b2cd>] ? dump_stack+0x48/0x76
[ 184.174767] [<c14063bc>] ? __skb_checksum_complete_head+0x5c/0x60
[ 184.174769] [<c144bb97>] ? tcp_v4_rcv+0x4e7/0x740
[ 184.174771] [<c143414a>] ? __inet_lookup_established+0x12a/0x2b0
[ 184.174773] [<c142c34d>] ? ip_local_deliver+0x11d/0x210
[ 184.174775] [<c142c815>] ? ip_rcv+0x3d5/0x640
[ 184.174777] [<c140b2a1>] ? __netif_receive_skb_core+0x3a1/0x4e0
[ 184.174779] [<c140cb07>] ? netif_receive_skb+0x17/0x90
[ 184.174780] [<c140cff7>] ? napi_gro_receive+0x67/0x90
[ 184.174783] [<c133c9c2>] ? sky2_poll+0x682/0xc00
[ 184.174785] [<c140df21>] ? net_rx_action+0x71/0x130
[ 184.174787] [<c103acc3>] ? __do_softirq+0xa3/0x160
[ 184.174789] [<c103ac20>] ? remote_softirq_receive+0x40/0x40
[ 184.174790] <IRQ> [<c103ae65>] ? irq_exit+0x45/0x50
[ 184.174793] [<c1003a1a>] ? do_IRQ+0x3a/0xa0
[ 184.174795] [<c1490f2c>] ? common_interrupt+0x2c/0x31
[ 184.174797] [<c1066d22>] ? cpu_startup_entry+0x62/0xf0
[ 184.174799] [<c15f6949>] ? start_kernel+0x2a8/0x2ad
[ 184.174801] [<c15f64ed>] ? repair_env_string+0x4d/0x4d