Agnello George wrote:
> Hi
> I have small query, all our server are centos based 5 and 5.2 . We are
> looking ofr a tool to that measure packet loss. we have servers in two
> IDC's bothin the US and we are trying to download a 2gb file from
> the internet. Some server are able to download the file at a higher
> b/w rate in one IDC ...while servers at he the other IDC download
> the same file at a lowe b/w rate . Is ther any tool to measure packet
> losses.
# netstat -s
......
Tcp:
4192230 active connections openings
12120496 passive connection openings
117185 failed connection attempts
129707 connection resets received
69 connections established
980405402 segments received
1087064944 segments send out
1572505 segments retransmited
11611 bad segments received.
91074 resets sent
.....
(the ..... are because it shows a lot more stats than just tcp). your
'dropped packets' are represented by 'segments retransmitted'.
the only other way to measure dropped packets is to send test packets
like via the PING command, and measure the responses. this, of
course, can interfere with your normal traffic if the links are near
saturated.