topic Re: Urgent : The result Of Ping command in Operating System - Linux

Urgent : The result Of Ping command

John CLARK_5 — Wed, 27 Apr 2005 13:21:45 GMT

Hi,

I have a problem : when i try to ping my Linux redhat Server,the ping is not regular.
It returns alterantively : timeout....in a line and request in the other line....
I check the cable and the switch,all is correct.
Do you have any idea about this : i had think about the auto-negotiate parameter, but it doesn't
resolve the problem.

Please,help me.

The result of ping command is important,because users are connected to a database and this irregular
result of ping can done problems.

Ps : I have Linux Redhat 3 AS
Regards.

Re: Urgent : The result Of Ping command

Steven E. Protter — Wed, 27 Apr 2005 14:11:37 GMT

PING_WAIT=30
CLUSTER2_IPADDR=ip_to_ping

/bin/ping -c 1 -w $PING_WAIT $CLUSTER2_IPADDR > /dev/null
rc=$?
if [ $rc -ne 0 ]
then
echo "ping test failed...."
(( NET_FAIL_COUNT = NET_FAIL_COUNT + 1 ))
fi

What the code does is try and send 1 ping out and wait 30 seconds in this example for an answer. if the test fails put logic in that takes appropriate action.

SEP

Re: Urgent : The result Of Ping command

Stuart Browne — Wed, 27 Apr 2005 18:54:27 GMT

Which network driver are you using? (lsmod)

Also, do you know if you have any limiters in the firewall?

You've said you've 'checked' the cable. What did you do, just re-seat it? Try completely replacing the cable (I assume it's just a patch lead between server/switch). Also try a different port in the switch.

Re: Urgent : The result Of Ping command

Paul Cross_1 — Thu, 28 Apr 2005 11:54:41 GMT

Can you paste the output of your ping? If I am understanding you correctly, you are getting one returned ICMP request and one failed? Correct me if I'm wrong.

If this is the case you could have routing problems, or even DNS problems (a dns name pointing at 2 IP numbers can cause this).

-paul.