Interpreting netstat output

[Ernie Luzar]

I keep seeing this in the periodic daily output.
During the day I issue netstat -id command and I see the number of Oerrs 
  increase on the vge0 interface.

Network interface status:
Name    Mtu Network       Address Ipkts  Ierrs Idrop Opkts  Oerrs
em0    1500 <Link#1>      xxxxxx  430877 0     0     767138  0
em0       - 10.0.0.0/8    xxxxxx    5625 -     -       5745  -
vge0   1500 <Link#2>      xxxxxx 2553560 0     0     434774  7
vge0      - 25.85.45.0/20 xxxxxx    1368 -     -     1200    -


What does this Out errors count really mean and what should I be doing 
about it?