thanks for reply  chrubis,
 
Actually  i relized below mentioned suggetion given by you.Currently i am trying to find out exact root cause for this issue :

The Network stress interfaces part of the LTP stress fails.

network_stress.interface:if4-mtu-change                 FAIL       2   

Below are the cause for failing above mentioned testcase:

if4-mtu-change01    0  TINFO  :  Verify the IPv4 connectivity is not broken when ifconfig command changes MTU 128 times every 5 seconds

if4-mtu-change01    1  TFAIL  :  eth1 is broken.

if4-mtu-change02    0  TINFO  :  Verify the IPv4 connectivity is not broken when ip command changes MTU 128 times every 5 seconds

if4-mtu-change02    2  TBROK  :  Test Link 0 is somthing wrong.

Could u Please provide  me any pointer/suggstion.
 
Thanks and Regards,
Bhushan


From: chrubis@suse.cz [mailto:chrubis@suse.cz]
Sent: Tue 2/12/2013 8:11 PM
To: Bhushan Kumar
Cc: ltp-list@lists.sourceforge.net
Subject: Re: [LTP] LTP] [PATCH ]: network stress interfaces part of the LTP stress fails

Hi!
>      check_icmpv4_connectivity $lhost_ifname $rhost_ipv4addr
>
> +    sleep 5
>
>      if [ $? -ne 0 ]; then

This is wrong as you check the return value from the sleep command
rather than the return value form the check_icmpv4_connectivity.

--
Cyril Hrubis
chrubis@suse.cz


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