[CentOS] DUP! on ping reply

Sun Apr 9 00:07:51 UTC 2006
Barry L. Kline <blkline at attglobal.net>

Matt Arnilo S. Baluyos (Mailing Lists) wrote:
> Hello List,
> I'm running a ping command to monitor our connection to the Internet.
> Around yesterday, I was getting a lot of (DUP!) text on the replies.
> Would anyone know what that means?

man ping

... [snip] ...
  ping will report duplicate and  damaged  packets.   Duplicate  packets
  should  never occur, and seem to be caused by inappropriate link-level
  retransmissions.  Duplicates may occur  in  many  situations  and  are
  rarely  (if  ever) a good sign, although the presence of low levels of
  duplicates may not always be cause for alarm.

  Damaged packets are obviously serious cause for alarm and often  indi-
  cate  broken hardware somewhere in the ping packet’s path (in the net-
  work or in the hosts).