Re: Crazy Ping Results

["David A. De Graaf" <dad datix 2y net>]

On Wed, Jan 30, 2002 at 02:57:58PM -0500, Pete Peterson wrote:
> 
> I have a very strange problem with "ping" in the 7.2 machine that I just
> loaded from scratch.  If I ping by IP, things look normal; if I ping
> by name, the name is resolved OK, but I get crazy ping results with
> times growing by 4 seconds.  Here is an example pinging a machine on
> our local network (one of our name servers).
> 
> 
> [root torvalds rc3.d]# ping ns1.genrad.com
> PING ns1.genrad.com (132.223.4.1) from 132.223.32.43 : 56(84) bytes of data.
> Warning: time of day goes back, taking countermeasures.
> 64 bytes from ns1.genrad.com (132.223.4.1): icmp_seq=0 ttl=254 time=708 usec
> 64 bytes from ns1.genrad.com (132.223.4.1): icmp_seq=1 ttl=254 time=4.023 sec
> 64 bytes from ns1.genrad.com (132.223.4.1): icmp_seq=2 ttl=254 time=8.043 sec
> 64 bytes from ns1.genrad.com (132.223.4.1): icmp_seq=3 ttl=254 time=12.062 sec
> 64 bytes from ns1.genrad.com (132.223.4.1): icmp_seq=4 ttl=254 time=16.083 sec
> 64 bytes from ns1.genrad.com (132.223.4.1): icmp_seq=5 ttl=254 time=20.102 sec
> 
> --- ns1.genrad.com ping statistics ---
> 31 packets transmitted, 7 packets received, 77% packet loss
> round-trip min/avg/max/mdev = 0.708/12062.683/24122.945/8040.418 ms
 
I have seen results like this when there are two nameservers listed
in /etc/resolv.conf and the first one is not accessible.
The time increase is due to the wait for that request to time out.

-- 
	David A. De Graaf    DATIX, Inc.    Hendersonville, NC
	dad datix 2y net    (828) 696-8646;  fax (828) 694-1037