I am trying to troubleshoot a network connection. The connection is through an Ethernet cable, that goes all the way from my computer to my modem/router combo.  What happens is that, with increasing frequency over time, my internet becomes unbearable: the ping jumps into the 300s, both download and upload speed fall dramatically. Initially I thought it'd be a router problem, since my old one was outdated to say the least. A man from my ISP came and switched it for a newer model and everything seemed fine for a couple of days, but then the problem came back and it hit harder.  I decided to ping a reliable server, ping google.com -t during one of these phases using this same computer, and this was the result. I'm at a loss for what can be done. Should I be complaining? What should I do? When I ping my home router from the computer the response is instant all the times.  Imgur album with all the details:
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In our home network, with continuous network IO happening latencies get ridiculous. It's fine with light loads but quickly becomes unusable if I'm, say, rsyncing a large number of small files, --other transfers essentially stop. Pings get through just barely.  Simple topology -- a broadband modem / WIFI router in a single box, with some wireless and some wired clients.   I've tried setting ifconfig wlan0/eth0 txqueuelen 1 on all clients, this seems to help a bit but not by much.  Tips welcome: how should I go about diagnosing and eliminating latency problems? Are there more configuration settings I can set on clients, or maybe a better WIFI routers could help?
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I have problem (seems to be trivia) about Ubuntu Terminal. Once my network connection slow down then it (sometimes but very rare to happened) showed some information like this.     I shocked because I have been got 2,919 PB/s. Sorry my mouse block some part of letter 'P' (I actually rush to print screen) but I believe you can recognize it.    EDIT    based on answer given to me, and I got similar info then, I'd like to add more clearly new image after.    Can someone explain it to me?  Best Regards!
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I just upgraded from Ubuntu 18.04 to 20.04 on one of the  machines, and the network performance is abhorrent. Internet speed is very fast from a google speed test (>300Mb/s for both upload and download).     However, whenever I try to browse a website or even run sudo apt update the connection will often time out. My internet is very fast on all other devices and I really don't know how to debug this problem.  sudo lshw -class network -short &amp;&amp; nmcli device status    shows  H/W path           Device           Class          Description ============================================================== /0/100/1c.6/0      wlp2s0           network        Wi-Fi 6 AX200 /3                 br-96f5b790e29e  network        Ethernet interface /4                 br-15e76fb81c05  network        Ethernet interface /5                 docker0          network        Ethernet interface  DEVICE           TYPE      STATE         CONNECTION       wlp2s0           wifi      connected     CSA HQ           br-15e76fb81c05  bridge    connected     br-15e76fb81c05  br-96f5b790e29e  bridge    connected     br-96f5b790e29e  docker0          bridge    connected     docker0          p2p-dev-wlp2s0   wifi-p2p  disconnected  --               lo               loopback  unmanaged     --               gpd0             tun       unmanaged     --                Solution:  It seems like this is a pretty common problem, and one without a definitive cause. For me, it was because Ubuntu resets the TLP configuration, and the power management went back to "on". I disabled Wi-Fi power management directly by editing:  sudo nano /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf   Then changed the value from 3 to 2, saved changes and rebooted.  I actually got this solution from Reddit and this worked for my case specifically but it seems like it could be caused by a bunch of other things. Read all the proposed solutions below!
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tools.pingdom.com gives a speed analysis of any given website. What does it mean when most of the load time is spent on waiting? I am using a CDN.
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When I plug my laptop via LAN cable and check speed on speedtest.net I have over 32 Mb/sec. When I unplug the cable and connect to the same router I have less than 15 Mb/sec. I tried to change channels already but this didn't help. I'm sitting just near the router.   What can it be? The router is a Dlink 400.
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Endless timeouts...     Request timed out.     Request timed out.     Request timed out.     Request timed out.     Request timed out.     Reply from 192.168.1.11: bytes=32 time=105ms TTL=64     Reply from 192.168.1.11: bytes=32 time&lt;1ms TTL=64     Reply from 192.168.1.11: bytes=32 time&lt;1ms TTL=64     Reply from 192.168.1.11: bytes=32 time&lt;1ms TTL=64     Reply from 192.168.1.11: bytes=32 time&lt;1ms TTL=64     Reply from 192.168.1.11: bytes=32 time&lt;1ms TTL=64     Reply from 192.168.1.11: bytes=32 time&lt;1ms TTL=64     Request timed out.     Request timed out.     Reply from 192.168.1.11: bytes=32 time=105ms TTL=64     Reply from 192.168.1.11: bytes=32 time=26ms TTL=64     Reply from 192.168.1.11: bytes=32 time=48ms TTL=64     Reply from 192.168.1.11: bytes=32 time=71ms TTL=64     Reply from 192.168.1.11: bytes=32 time=5ms TTL=64     Reply from 192.168.1.11: bytes=32 time=17ms TTL=64     Reply from 192.168.1.11: bytes=32 time=39ms TTL=64     Reply from 192.168.1.11: bytes=32 time=61ms TTL=64     Reply from 192.168.1.11: bytes=32 time=87ms TTL=64   I'm having a small problem with my debian box (not running any gnome/kde...). I can get the wireless to work, but only if I connect the ethernet cable in for a second or two.  Above is my ping result from my workmachine. I turned off the debian box, started the ping and turned the debian box on. I got a endlessly Request timed out untill i plugged in the ethernet. I've then removed the the ethernet cable (the two time outs in the middle there). Wireless is still up after ethernet is removed and I can putty my way in.  I'm using auto wlan0 but I've also tried allow-hotplug :-( /etc/network/interfaces)
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When I ping www.google.com and 8.8.8.8, I get no reply:  # ping www.google.com PING www.google.com (216.58.221.228) 56(84) bytes of data. ( no response)  # ping 8.8.8.8 PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data. ( no response)  20 packets transmitted, 0 received, 100% packet loss, time 19006ms   There has been no response. But, both curl and wget are OK. My OS is CentOS 7.  Here is my network configuration file:  # cat /etc/sysconfig/network-scripts/ifcfg-ens33  TYPE=Ethernet #BOOTPROTO=dhcp BOOTPROTO=static DEFROUTE=yes PEERDNS=yes PEERROUTES=yes #IPV4_FAILURE_FATAL=no IPADDR=192.168.42.12 NETMASK=255.255.255.0 GATEWAY=192.168.42.129 DNS1=192.168.42.129 DNS2=114.114.114.114 IPV6INIT=no IPV6_AUTOCONF=no IPV6_DEFROUTE=yes IPV6_PEERDNS=yes IPV6_PEERROUTES=yes IPV6_FAILURE_FATAL=no NAME=ens33 UUID=e7328f29-6313-4382-8023-b7740ed4f7ad ONBOOT=yes   Here is ip  and route information:  # ip addr 1: lo: &lt;LOOPBACK,UP,LOWER_UP&gt; mtu 65536 qdisc noqueue state UNKNOWN      link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00     inet 127.0.0.1/8 scope host lo        valid_lft forever preferred_lft forever     inet6 ::1/128 scope host         valid_lft forever preferred_lft forever 2: ens33: &lt;BROADCAST,MULTICAST,UP,LOWER_UP&gt; mtu 1500 qdisc pfifo_fast state UP qlen 1000     link/ether 00:0c:29:4d:df:bf brd ff:ff:ff:ff:ff:ff     inet 192.168.42.12/24 brd 192.168.42.255 scope global ens33        valid_lft forever preferred_lft forever     inet6 fe80::20c:29ff:fe4d:dfbf/64 scope link         valid_lft forever preferred_lft forever 3: tun0: &lt;POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP&gt; mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 100     link/none      inet 10.8.0.1 peer 10.8.0.2/32 scope global tun0        valid_lft forever preferred_lft forever # ip route default via 192.168.42.129 dev ens33  proto static  metric 100  10.8.0.0/24 via 10.8.0.2 dev tun0  10.8.0.2 dev tun0  proto kernel  scope link  src 10.8.0.1  192.168.42.0/24 dev ens33  proto kernel  scope link  src 192.168.42.12  metric 100      cat /etc/sysctl.conf | grep echo   outputs nothing.  I see, not be able to connect to Google because of the firewall:GFW.  traceroute output:  # traceroute -T www.google.com traceroute to www.google.com (216.58.197.100), 30 hops max, 60 byte packets  1  gateway (192.168.42.129)  0.541 ms  0.378 ms  0.294 ms  2  * * *  3  * * *  4  * * *  5  * * *  6  * * *  7  * * *  8  * * *  9  * * * 10  * * * 11  * * * 12  * * * 13  * * * 14  * * * 15  * * * 16  * * * 17  * * * 18  * * * 19  * * * 20  * * * 21  * * * 22  * * * 23  * * * 24  * * * 25  * * * 26  * * * 27  * * * 28  * * * 29  * * * 30  * * *   traceroute with www.vim.org output:       # traceroute -T www.vim.org traceroute to www.vim.org (216.34.181.97), 30 hops max, 60 byte packets  1  gateway (192.168.42.129)  0.447 ms  0.419 ms  0.287 ms  2  * * *  3  * * *  4  * * *  5  * * *  6  * * *  7  * * *  8  * * *  9  * * * 10  * * * 11  * * * 12  * * * 13  * * * 14  * * * 15  * * * 16  * * * 17  * * * 18  vhost.sourceforge.net (216.34.181.97)  229.060 ms  214.904 ms  220.727 ms   But , ping www.vim.org  also have no response.   # ping www.vim.org PING vhost.sourceforge.net (216.34.181.97) 56(84) bytes of data. (no response)   Thank you for any advice.
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Here in the UK, everytime you sign up to an ISP they will provide you with a router to connect at home. These are usually cheap netgear home routers (the one I'm using is a DGN-1000SP) with a basic GUI firmware. With 3 people in the flat, we usually have around 6 devices (3 PC's and 3 mobile devices) but sometimes up to 10 as more devices/guests come into play.  However, I've noticed that the network slows down massively when the number of devices get to 8 or so. Logging into my router's GUI I notice that the list of attached devices keep changing; sometimes there are as little as 3 devices connected and sometimes all 6 are shown.  Is this because the router cannot handle all the simultaneous requests (hardware fault) or because the internet connection is too slow? The connection is ADSL with 5Mbps down and 1Mbps up.  What are some ways I could fix this? Will establishing another access point with my spare router, wired to the original access point but broadcasting a different wireless channel and throwing traffic to this router help if the problem is to do with hardware?
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I am trying to set up internet access with a Linksys WRT54G router (DD-WRT, set as a AP) and a  which uses . The problem is that the router can’t connect to the Internet via the cable modem. At the top of the router management page, the router always reports:     WAN: disabled   The signal lights on the cable modem are all OK (blue) except the last one (internet), which is a blinking orange/yellow. The computer can see the router management page, but not the cable modem page (192.168.100.1).  If I connect the router directly to the computer, then internet connection works fine, and I can see the modem management page (192.168.100.1). I have used this router in the past few years to get Internet connection without a problem.  All above is with wired connections.  Has anyone had similar issues and does anyone know a solution?
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first question here. I was using wifi normally on my phone. Then I turned it off and after some time turned it back again. Since then I can not access the internet. It's showing Connected(no internet access).  I tried to set the IP static. It did not work for DNS 192.168.200.1. No matter what IP I set with this DNS it does not work. Then used the 8.8.8.8 as DNS, now it's connected. But it is really slow, and the connection does not seem stable. Every time I have to reload google.com several times just to get the page.  The problem is specific to this device only. Other devices connected to the same network are perfect.  Can someone suggest me what should I do? Is this a router issue? Or is this my device problem?  I'm new in this area. So my knowledge is not so deep and you might have to explain things a bit more in detail for me to grasp the concept.
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I'm got a video streaming application that runs fine in my office but fails miserably at the customer location. The symptom is that every couple of seconds, I stop receiving UDP packets for 2 seconds, then the stream resumes as if nothing is wrong.  I ran  at the customer location and it came back excellent. No dropped packets and low latency. The only difference I noticed between our two locations is that ping google.ca times-out at their location but works in mine.  How do I test whether the network I am on blocks incoming UDP packets? Is there a way for me to isolate who is dropping the packets?
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I ran my Internet connection through SpeedTest.net which claims that it finds out the actual Internet speed, much lower than that promised by my ISP.  But—while downloading—the speed is much lesser than the test results. Even after using download mangers like Internet Download Manager, there isn’t much difference.  Are some background apps consuming my Internet bandwidth? If so, how can I divert all of the bandwidth towards one application?
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The problem:   My desktop PC is connected via LAN/Network cable and DLAN (through electric powerline) with the router.  This connection is stable for most of the time, but after a random amount of time, I just get disconnected (still shows connected, but can't do anything online).  That's why I additionally put a WLAN card into my desktop PC.  I swap from LAN to WLAN every time said situation happens. Due to its frequency (4 to 5 times a day) and the fact that I play games most of the time I'm on my PC, this is a pretty time consuming and frustrating solution.  The question:   Do you know any software that can swap my connection once a certain download hreshhold is reached (it doesn't automatically swap, as the PC says I'm still connected (see above)).   If not so, is it possible to swap connections through batch? so I just have to click the batch and not through all the Windows menus?
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This is by far the weirdest problem I've come across,  My mac can perfectly access internet through safari web browser, but when I tried to do   ping www.google.com   through the terminal, it's requests is being timed out.  None of the other apps are able to reach internet either. Dropbox, Skype, Spotify all showing offline, except the browser itself  I'm guessing something bad with the DNS, but spend 2 hours trying to fix this with no luck
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I configured my new router and noticed that WiFi connection is way slower than Ethernet connection.   Ethernet connection giving a download speed of ~60Mbps and upload speed of ~30Mbps while the Wifi only giving download speed of ~20Mbps and upload speed of ~15Mbps.  This is a new router with 802.11n and it says it support 300Mbps.  Here are the Wifi settings of the router,is there anything I can change to get higher speed :
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I need to permanently increase network latency in approximately 100ms, without losing packets.  Reason: On a certain server and internet game my ping is too much lower than the other people playing it. I have 15ms, when average is 150ms which gives me cheater-like advantages.  So also out of curiosity I'm looking for ways to increase my ping while keeping connection stable. What are my options if any?  I thought about VPN services, but it seems like a bad option since games use UDP?  Is there any router/software that would assist me on this?  I'm on windows.
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Is there a way on OSX or with a 3rd party software to use both a Wi-fi and an ethernet connection, thus having the sum of the connection speeds?  Or maybe making some applications connect to one connection and other apps connect to the other?    P.S. I don't want to bridge one connection over the other. P.P.S. Both are different connections with two different ISPs and both are paid for, there's no wifi stealing if you might ask.