20% packet loss affects performance?
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Cabo81
25 pts.
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Q:
20% packet loss affects performance?
Networking, Routers, 3Com
Hi. I've been noticed that I have some packet loss when I do ping from our 3Com router 5642 to the default gateway of our provider.

<codinet03>ping 10.162.66.185
PING 10.162.66.185: 56 data bytes, press CTRL_C to break
Reply from 10.162.66.185: bytes=56 Sequence=1 ttl=255 time=3 ms
Reply from 10.162.66.185: bytes=56 Sequence=2 ttl=255 time=1 ms
Request time out
Reply from 10.162.66.185: bytes=56 Sequence=4 ttl=255 time=2 ms
Reply from 10.162.66.185: bytes=56 Sequence=5 ttl=255 time=1 ms

--- 10.162.66.185 ping statistics ---
5 packet(s) transmitted
4 packet(s) received
20.00% packet loss
round-trip min/avg/max = 1/1/3 ms


We did the last mile between our provider and us and once I called them because I felt network slow. They told me that could be the packet loss (20%) that make the Internet slow and I should verify this. Is really a 20% of packet loss that ocurrs sometimes, a major problem for our Internet conection??

Thanks in advanced
ASKED: Feb 5 2008  2:58 PM GMT
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Labnuke99
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Absolutely.... 1% packet loss can create major issues on a connection due to the TCP backoff algorithm. This means that packet retransmits and window updates have to happen. Both of these reduce network throughput. Run pathping on a Windows XP or above box to see where the packet loss is happening along the path. Then talk to the responsible parties between those two points.
Last Answered: May 21 2008  8:36 PM GMT by Labnuke99   26290 pts.
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Petkoa   1005 pts.  |   May 22 2008  2:42PM GMT

I’ll agree with Labnuke99, you situation is quite serious. Recently, due to a LAN switch failure some PCs got 0% pings lost with standard packets (bytes=56) and ~20% with 1024 b packets (ping -t -l 1024 <a href="http://some.host.name" title="http://some.host. " target="_blank">some.host.name</a>) and this led to a major user “under-satisfaction”…

BR,

Petko

 
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