[lug] Variable ping times

Lee Woodworth blug-mail at duboulder.com
Fri Aug 31 22:30:34 MDT 2007

Carl Hamlin wrote:
> Lee Woodworth wrote:
>> Is the following a symptom of a routing issue or something else? This
>> is on an internal 100mb lan.
>> # ping
>> PING ( 56(84) bytes of data.
>> 64 bytes from icmp_seq=1 ttl=63 time=1.45 ms
>> (Bunch of return data indicating variable bounce times)
>> --- ping statistics ---
>> 11 packets transmitted, 11 received, 0% packet loss, time 10005ms
>> rtt min/avg/max/mdev = 0.378/1.010/1.523/0.509 ms
> Are you troubleshooting a connectivity issue, or are there other
> symptoms at work?

I have been having some weird intermittent net connection issues, and
saw this variation. The lan doesn't have much traffic and previously
had consistent ping times down in the 0.35ms range. I recently moved
some subnet routing from a NAT box to an internal server, so I as wondering
if the software routing might be misconfigured. The server's kernel
version is 2.6.17.

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| client |-----LAN-----| server |----DMZ---| fw |---->internet
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