Wireshark mailing list archives
Re: 8-10% packet error/loss is normal wired network?
From: Flako <subforos () gmail com>
Date: Tue, 10 Jul 2012 12:32:12 -0300
Hello Jim Counting only "tcp.analysis.retransmission" I'm from 0.95% to 1.21%, a value more enjoyable. :) I think it's despicable for further research .. but I get the question if this value is normal :) In a wireless link, a loss of 1% is acceptable, but in a network cableda? Something strange I have in the network, because making you ping ip of the printer, lost packets (8 of 10 330). A value despreciale but should not happen. 2012/7/10 Jim () agdatasystems com <Jim () agdatasystems com>
No, 8 to 10% is not normal, but your display filter is grossly over-counting the packet loss. To start with, by showing both the packet with the "previous segment lost" message and also the retransmission, you're counting each lost packet twice. And then, a single lost packet requires at least three duplicate ACKs before a fast retransmission is generated. Try filtering on retransmissions only. This will give you a more accurate count of lost packets. By the way, tcp.analysis.retransmission includes fast retransmissions, so you don't have to include tcp.analysis.fast_retransmission as a separate display filter condition. ----- Reply message ----- From: "Flako" <subforos () gmail com> To: <wireshark-users () wireshark org> Subject: [Wireshark-users] 8-10% packet error/loss is normal wired network? Date: Tue, Jul 10, 2012 6:04 AM Hello I am analyzing the network with wireshark :) and found 8-10% of lost packets (filter: malformed | | tcp.analysis.lost_segment | | tcp.analysis.retransmission | | tcp.analysis.fast_retransmission | | tcp.analysis.duplicate_ack ) between various Linux desktop and an HP 2420n (network printer) The printer is connected to switch A (100Mbit) and dektop are connected to the switch B (1Gbit), where A and B swich are interconnected. The printer was replaced (otherwise error) and the new printer keeps happening the same. I can only see wiring issues. On if my question is if this% is "normal" (hard word) in a wired network scheme (it seems to me much) Is there any way to look at something else, to know that it also occurs to a statistic on the filter showing up? Thanks for reading. and sorry for using google translate. ___________________________________________________________________________ Sent via: Wireshark-users mailing list <wireshark-users () wireshark org> Archives: http://www.wireshark.org/lists/wireshark-users Unsubscribe: https://wireshark.org/mailman/options/wireshark-users mailto:wireshark-users-request () wireshark org ?subject=unsubscribe
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Current thread:
- 8-10% packet error/loss is normal wired network? Flako (Jul 10)
- <Possible follow-ups>
- Re: 8-10% packet error/loss is normal wired network? Jim () agdatasystems com (Jul 10)
- Re: 8-10% packet error/loss is normal wired network? Flako (Jul 10)
- Re: 8-10% packet error/loss is normal wired network? Prigge Scott (Jul 10)
- Message not available
- Re: 8-10% packet error/loss is normal wired network? Jim Aragon (Jul 10)
- Re: 8-10% packet error/loss is normal wired network? Flako (Jul 11)
- Re: 8-10% packet error/loss is normal wired network? Frank Bulk (Jul 11)
- Re: 8-10% packet error/loss is normal wired network? Flako (Jul 12)
- Re: 8-10% packet error/loss is normal wired network? Kok-Yong Tan (Jul 12)
- Re: 8-10% packet error/loss is normal wired network? Shawn T Carroll (Jul 12)
- Re: 8-10% packet error/loss is normal wired network? Flako (Jul 10)