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2answers
41 views

Public network Wi-Fi connection problems

My friend and I have free public Wi-Fi at college. Her Wi-Fi used to work fine, and still does in the other buildings. However, for a long time now her Wi-Fi (which has excellent connection) won't ...
0
votes
0answers
26 views

What is the right procedure to check where my packet loss comes from?

I installed a new ADSL line and on my desktop I'm using a WIFI usb pen to receive the signal from my modem (Netgear DGN2200v4). I took some speed tests and ping tests and I noticed that I have an ...
0
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1answer
38 views

Suddenly blocked from a site [closed]

Suddenly from a time to now I haven't been able to go to a site I used to go frequently for maintenance (Wordpress). I tried different browsers, restarting my laptop, clearing cache, history, cookies. ...
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2answers
67 views

What does a network packet consists of?

I know basic networking but I am not very good at it. Now I am calculating how many packets will be lost if I use UDP over IPv4. I can assume that the protocol overhead for data sent via UDP over IPv4 ...
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5answers
541 views

Packet loss on native Windows 7, but not on Mac, Linux, WinXP or VM'd Win7. What?

I am managing a small handful of newish Dell laptops and desktops that use similar ethernet hardware -- Intel I217-LM for the desktops and Intel I218-LM for the laptops. These all are running the same ...
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1answer
272 views

Home ADSL Modem Dropping Packets?

I know this is supposed to be a "pro" forum, but I'm hoping someone can help since my ISP isn't doing much to try and fix things. My ISP has given me a DSL modem / Router combo - a ADB / Pirelli P.DG ...
2
votes
2answers
151 views

Computer causes internet loss on other devices

I have a switch that is directly connected to my modem. attached to this switch are a computer, PS3, PS4 and a NAS. They all have been assigned static IP addresses. My problem is the following: ...
1
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0answers
24 views

Losing first hundred pings

My internet connection seemed slow, so I did: sudo ping -f www.google.com The strange thing is that I see I'm losing the first couple hundreds of pings, but after that it behaves as it should ...
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0answers
229 views

Recording RTSP using FFmpeg without packetloss

I want to record an RTSP stream using ffmpeg. ffmpeg -i "rtsp://link" -acodec copy -vcodec copy output.flv I am able to record. But its always missing packets like [NULL @ 0x2818340] RTP: missed ...
1
vote
1answer
177 views

OS X: how to make it reply to “ICMP time stamp query”?

As per another question, I'm using hping--icmp-ts to send the ICMP time stamp requests to debug asymmetric routes. It seems like my OpenBSD box generates time stamp replies by default without any ...
1
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0answers
537 views

Mac mini Wi-Fi super slow sometimes

I have a new Mac mini mid-2012 that has been working quite well for the last two months. However, there are times now that the internet stops working for some time. Here are the details of my issue: ...
0
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1answer
137 views

Strange router behavior — packet loss, truncated HTTP responses

I am encountering some strange behavior with a new home WiFi router. Pinging outside servers (i.e. google.com, amazon.com) has 30% packet loss, and HTTP requests with wget only give me the first 1-2kB ...
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0answers
276 views

Mysterious, consistent packet loss

A few days ago I started having strange problems with my internet connection. It disconnected at seemingly random times, and I had to restart my router to bring it back up. I also noticed that it ...
1
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2answers
1k views

Where is packet loss occuring? (Interpreting MTR)

If MTR is showing something like: 1. 192.168.0.1 0.0% 2. 1.2.3.4 50.0% 3. etc That clearly shows that the packet loss is my ISP's fault, correct? But if I'm seeing: 1. 192.168.0.1 ...
0
votes
2answers
287 views

TCP Throughput versus Packet Loss

How does the packet loss rate affect the TCP throughput rate: throughput rate reduce exponentially with respect to loss increase or throughput rate reduces by the same amount as loss increase?
1
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0answers
136 views

optimise PuTTY on Windows 7 for huge & steady packet loss

There's a 25% packet loss between my connection and that of my server, and my server company doesn't want to do anything about it, since it's at one of their peers, not directly on their ...
0
votes
1answer
300 views

Troubleshooting “bursty” network traffic

I've been having a problem with my Internet connection ever since moving to San Francisco, and it's driving me absolutely up the wall. After using my network connection for anywhere between five and ...
2
votes
2answers
194 views

Is there any way to use my integrated laptop antenna together with an external USB antenna redundantly to reduce packet loss?

I am forced to get my internet from a slightly far access point, and as a consequence wifi quality is poor due to packet loss. Is there any way I can use both my laptop's inner wifi card and my ...
1
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2answers
2k views

How can I find the source of packet loss in a traceroute?

Whenever I ping my website, I get 5% packet loss consistently. However, pinging other sites such as google produce no packet loss. I'm really not fond of my webserver dropping packets, but I'm not ...
1
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1answer
349 views

IP checksum offload

I recently updated to Windows 8 and get alot of invalid packet transfers. It says "Ip checksum offload?" (Wireshark) and most of my packets get lost. The checksum is 0x00. I also updated my NIC ...
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0answers
322 views

What would cause different rates of packet loss between client and server in UDP?

If I've implemented a reliable UDP file transfer protocol and I have a file that deliberately drops a percentage of packets when I transmit, why would it be more evident that transmission time ...
2
votes
1answer
570 views

How to interpret skype packet loss numbers?

I'm using a fairly bad internet connection at the minute, and have turned on the "Display technical call info" option. This shows a window with lots of numbers including both send and receive packet ...
1
vote
1answer
435 views

Unusable network, packet losses between router and NIC

I have this setup: Gigabyte P35-DS3P motherboard Asus NX1101 PCI network card (the one on the motherboard got fried a few years ago by a power surge) Asus RT-N16 router Windows 7 x64 I think ...
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votes
1answer
3k views

Wireless traffic stops when downloading large files at high speed: packets lost (Linksys WRT120N router)

The problem Note: First I'd like to understand WHY this is happening. Ofcourse, a solution would be nice too. :) When downloading a large file over HTTP at high-speeds, my wireless traffic basically ...
3
votes
3answers
705 views

Does a bad Internet connection increase bandwidth usage?

My (Rogers) cable connection has been pretty bad recently (channels 3 and 10 are particularly fuzzy—it’s analog, not digital cable). Not surprisingly, this has caused my cable modem to drop out and ...
0
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0answers
465 views

On ping first packet fails

I am trying to ping a virtual machine.The first packet always fails and rest all packets are recieved.The DNS of the virtual machine is configured manually.Can someone help on what can be the issue
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1answer
1k views

How do I troubleshoot distant Internet routing problems?

(This may be better answered on serverfault, but it's not technically about a server, so suggestions welcome...) We just moved offices at work. We're in Cambridge, MA, and have a Comcast ...
0
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3answers
111 views

A particular networking problem

I know this is a long shot, but I figured I'd try... I have periodic network connectivity glitches. I'm not sure what's causing them. Every minute or so the internet is inaccessible for 2-3 seconds. ...
5
votes
2answers
1k views

High packet loss - all hops show red

I've run Ping Plotter and here are the results with high packet loss on all hops (around 12%). I find hard to believe Google's routers are faulty, is it my network card to blame? Click the ...
4
votes
4answers
4k views

How to test Bit Error Rates on Ethernet Networks?

I need a tool software or otherwise (preferably software) that will allow me to test Bit Error Rates on an Ethernet Network. I am using a software tool that I did not write and do not have access to ...
1
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3answers
2k views

Internet issues despite fast speed test results

I recently switched to Verizon FiOS and am experiencing some issues with my internet. I tested my connection speed at dslreports and received the report stating that I had 25mbps for both upload and ...
0
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0answers
85 views

Mysterious packet loss

Sender station: Receiver station: The two computers are directly connected one to another without any switch or router. Netstat gives no clue what is happening. Amount of received packets is ...
0
votes
1answer
143 views

Specific Linux application loses Synergy connection

I have a Synergy setup with Win 7 as the host and CentOS 5.5 Linux as a client. Everything works great in general...I can smoothly move between the two environments with my single mouse and keyboard. ...
1
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2answers
811 views

Network corruption - corrupt downloads, corrupt streams, etc

I've been having some problems with my home LAN. Downloaded executables won't run, my remote desktop sessions keep getting interrupted due to encryption errors, flash video streams show visible ...
1
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1answer
880 views

Simulate packet losses over a network switch

We have a network switch here and we can easily ask it to limit the bandwidth it allows, which is nice. It would be great if we could also ask it to generate packet losses for us - doing this with ...
7
votes
2answers
1k views

Which stats are important when looking at DSL line quality, and what do they mean?

I've started getting periodic packet loss on my DSL connection lately, and am trying to understand what conditions are causing this. My DSL modem has a stats page with values for "SN margin (dB)" and ...
1
vote
0answers
2k views

Packet drop measured by ethtool, tcpdump and ifconfig

I have a question regarding packet drops. I am running a test to determine when packet drops occur. I'm using a Spirent TestCenter through a switch (necessary to aggregate Ethernet traffic from 5 ...
1
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4answers
4k views

iPod touch has extremely slow wifi, drops packets - only on my router

I just purchased an iPod Touch. I am having a lot of trouble with its speeds on my Tenda W311R, but it has no speed problems on my neighbor's Netgear router. It will connect and authenticate to my ...
1
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3answers
4k views

How to diagnose local NIC (wired) losing packets?

My onboard Realtek RTL8168B/8111B Family Gigabit Ethernet is losing packets (about 8% when pinging any other device on the LAN). There are no events in the Windows event logs relating to TCPIP/ICMP ...
1
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3answers
2k views

Wireless network connection loses signal strength when connected [duplicate]

Possible Duplicate: 5 Bars ‘till connected then 1 bar I am hooking up a wireless router for my granddaughter who lives next door. Her computer works when it is in my house. When I moved ...