Odd Packet Loss

[skyking135]

Pinging one of my routers I get the following results:

(Edited for brevity)
Reply from 123.45.67.89: bytes=32 time=50ms TTL=28
Reply from 123.45.67.89: bytes=32 time=40ms TTL=28
Reply from 123.45.67.89: bytes=32 time=40ms TTL=28
etc
etc
'For a total of 12 ping packets and then...'
Request timed out.
Request timed out.
Request timed out.
Reply from 123.45.67.89: bytes=32 time=931ms TTL=28

Ping statistics for 123.45.67.89:
Packets: Sent = 13, Received = 10, Lost = 3 (23% loss),
Approximate round trip times in milli-seconds:
Minimum = 40ms, Maximum = 431ms, Average = 63ms

Repeats every 12 packets without skipping a beat.

I have no idea the cause, so I turn to the experts.

Thanks

 

[rn4it]

There are a few things that I have seen that will give the symptoms that you have described. Firstly ping is a low priority protocol, so it is not always accurate. So if there is high amount of line utilization, you will get these symptoms. This is most likely the case, check out the utilization on the interface you are pinging, also check errors and drops.

 

[pansophic]

You may also want to try hping. It allows you to do ICMP, TCP or UDP pinging. TCP pinging is extremely reliable, and can frequently be passed through firewalls if you choose good source and destination ports. Like DNS and Web.

But it is VERY odd if it repeats exactly every 12 packets, and drops exactly 3 packets each time.


pansophic