Loss Of PC Visibility Within Network
Jul 18, 2012
I'm having what appears to be a random issue with my systems' ability to display various PC's on my network. Sometimes all the computers display when I open my MSHOME network and sometimes only six of them displayand the rest don't. I can always ping the computers whether they display or not.
My network has 13 computers, all running Windows XP SP3, one modem, one router and several switches. Some of the computers are access via wireless but most are hardwired to the network,
To the best of my knowledge, this is a recent event. The network has been up and running for over two years without me ever seeing this problem. I don't know if the problem exists on all computers but I do know that it exists on my personal workstation. It almost seems like an IP addressing conflict but there is no system error message indicating same.
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Jan 8, 2011
I've got a Vista Business PC and a Vista Business Laptop connected via a virgin media router (Netgear CG2100D) and I cannot get the two machines to see each other correctly over the network. The laptop is connected via wireless, whilst the pc is wired. Both are set to recieve their network settings automatically (DHCP) and both have the windows firewall (the only firewall on either) turned off completely.
I can ping each machine fine from one another using the ip addresses, and I can also connect via . However, connections via fail, and I cannot see the machines in the network map.
I have tried turning netBIOS to be "always on" on both adapters, but this makes no difference.
I've been messing around pretty much for 6 hours now and am getting quite fustrated by this! (my original aim was to get media sharing working, but I've pretty much abandoned that for now).
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Nov 4, 2011
I have an E4200 with a 500GB WD hard drive attached to the USB port. I also have 3 computers on the network named "THINK", "PC", and "DELL". THINK is mixed Wired and Wireless - depending on what I'm doing - Win7 Professional, DELL is plugged into a Range Extender. (RE1000) - WinXP (This one isn't as important: It's an older machine) PC is always hardwired. - Win7 Ultimate, Recently, THINK has unable to see DELL, OR even the HD connected to the router, but it can see PC. It can also see the HD as a media device - just not as a computer or device I can browse as it does on PC.However, PC can see everything: THINK, DELL, AND the HD and can access them all the way I would like it to be. Also - MY PS3 DOES see the Media Share and can access it. Edit: Also just discovered both internal and external FTP no long works. Why can't THINK see the HD connected to the router regardless if I'm wired or wireless? As far as I can tell, all the settings are identical on both THINK and PC. Is there a router setting I'm missing? IPV6 is disabled and I've treid the basic disabling of HOMEGROUP and anything that goes with it - but nothing yet.
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Mar 26, 2013
I have EA4500 router with latest firmware update. Cisco Connect Cloud behave strange. Some devices connected to the wireless router appear in CCC and some not. For instance, Iphone is visible, Ipad is not but both have normal accesss to internet.
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Feb 23, 2012
I just upgraded from an old Dlink D624 to a Linksys E1200. It seems to be working OK.
I have 2 problems and 1 question.
Question. The Dlink required that I enter the MAC for all devices, wireless and hardwired, to access in protected mode.
The E1200 doesn't seem to want or display any hardwired devices. Does that mean that any hardwired device gets unfettered access to the internet?
Problem #1. I entered real names when I setup any wireless devices. They do not appear anywhere, and especially not in the permitted MAC list.
Problem #2. I have a wireless printer (HP 3000) connected. It works OK on WIFI from the PC, but now not from my HP Touchpad, which doesn't see the printer. Does WIFI printing go through the router first?
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Jan 8, 2013
i'm having some problems to configure.i have two sites, a primary site and the secundary site, in both sites every switches are layer two. I configured and activated the RSTP (802.1W) in every switch, but about every 30 minutes the topology change and happening a delay in network and loss some ping (ICMP).
[Code]...
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Jan 12, 2011
Running 5 PC's and a laptop on a wired/wireless network at home. One PC running Win XP Pro started dropping the network connection (so it appeared) during browsing. Have found the following:
1. MSN messenger runs fine, and doesn't drop out
2. AVG antivirus updates with no issues
3. Web Pages in Chrome and IE will load fine one minute, then cannot load or pause for 1-2 minutes while loading
4. Can ping web addresses/IP addresses from command prompt with no issue.
5. Have changed the network connection from Ethernet to Wireless, which makes no difference to the issue.
6. If I "repair" the connection, and the network refreshes the IP address, I can browse successfully, for about a minute, before the issue occurs again. "Repair connection" again and can browse again for a minute.
7. Checking connected devices to the Netgear router, shows the PC name sometimes, against the IP address, other times it shows the PC as "unknown" against the PC address (when this occurs, web browsing is lost)
8. All other PC's on the network are fine.
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Nov 22, 2011
I keep losing connections to the internet and getting a couple of different messages that the Gateway IP address is invalid. There are times it happens every few minutes and other times I can go for a couple of days without it. Also, we have to have satellite internet which has such an inconsistent speed. Is it the internet speed inconsistency or the 4 year old Belkin N Router?OK, so I tried to copy the information from the CMD window, but I can't get it to work. After I got the information and right clicked and clicked "select all" then what. I couldn't copy it. I can't find my way back to the instructions.
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Mar 18, 2012
my local network another pc packet loss
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Apr 6, 2012
I am connecting to a Wireless network, through a ZyXel ZyAIR G-4100v2 router. My problem is that I am experiencing very regular packet loss every minute or so. This lasts for around 5-10 seconds on average. I am running XP with the latest service pack. So far, I have checked out;Wireless Zero Config scanning of new stations (disabled that feature).Xirrus network scan (signal is fine and consistent). I am not suffering from any degredation in signal, the problem seems to be that the router is simply not allowing anything through at regular intervals.
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Jun 27, 2011
I have recently been testing out the Kaillera netplay application thats embedded into a few old console emulators. Now the major problem is the de-sync between clients and I was wondering which is the best to reduce this.Say I have an upload speed of 1.2 Mbps and a download speed of 11.28 Mbps. Obviously, I am capped by my upload speed when it comes to changing how many packets i can send/receive per second because its all one setting and I am usually playing P2P.So, I am not entirely sure how big the packets are that are being sent, I am guesstimating based on what they said on Kaillera website that it is around 200-300 bits.Anyway, with my current upload speed I can transfer at a rate of like 600-800 packets per second depending on packet length.De-sync's happen quite often especially in the higher rom size games like Mario Party because of all the data being transferred. Would it be wiser to increase my setting of pps from 20 packets/sec to 60 packets/sec?
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Nov 9, 2011
My wrt110 firmware .05 has been working fine until now. I have a couple of phones, 2 printers, 3 laptops and a wii happily connecting to it. However now when I power on the wireless device, nothing can connect wirelessly. Wired connection is fine, but my wireless network disappears. No device can find the network, although it is there and set up on the admin pages. I pull the power chord out for 30 seconds and try again to get it going again, a bit like trying to start a car. Everntually devices find the network.
On two occasions it has forgotten the wireless settings and restored an open 'linksys' network. It's really infuriating becuase whilst I restore the SSID and use the same key, not all the devices actually recognise it and have to be reconfigured on the devices.
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May 16, 2012
The network id name for my router has reverted back to linksys a couple of times, also with the loss of password.
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Jul 24, 2011
So I have an WRVS4400N V2 and just got a new laptop with an Intel 6230 Wifi card in it and have an odd problem.While the laptop is on battery power the network gets massive packet loss.
I don't know what to do.Laptop manufacture says its AP but AP worked fine with old laptop and works fine when laptop is on power and all other devices seem to be fine with the exception of my Xbox 360 that wont connect if I have it on WPA2 but I will post another thread for that.
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Dec 12, 2012
i am implementing tcp as per rfc 793, i have one doubt, while sending first packet, if that packet lost means, tcp will wait for RTO and retransmit the first packet, and after got the ack for first packet, then only it will send second packet or without getting the ack for the first packet it will send second packet.
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Mar 29, 2012
My ping is 35ms my DLS at 45.6 Mbps and my Upload is 4.51 Mbps. My Problem is that i am losing about 60 to 90 percent of the packets on a pingtest.net.
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Aug 10, 2011
For about the past 2 or 3 months, I have been experiencing outbound packet loss at about the same time every evening. That timeframe is about 7 PM - 10 PM. This is most noticeable on Teamspeak 3 because of the voice disruption that other users report to me.
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Feb 19, 2013
I have recently switch internet to Time Warner. Since the day I got it, i have experienced random packet losses of 100%. I have called time warner and they are going to send a tech out. But i would like to know more about this before he comes. I have replaced the modem with a brand new one. Surfboard SB5101N from the one i was leasing from them. They both do the same thing. I have made sure all my Drivers are up to date. I have replaced the coax cable and Ethernet cable and ran my Anti Virus and Spyware program. It does it more during online game, I have reinstalled the game and was having no problems with the ATT Dsl i had before this.
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Apr 18, 2012
My workplace has a UC-540 attached to a cable modem, attached to the world wide web.
When we make VOIP outbound calls through the standard ISP, there is no auditory packet loss sympton; however, when we make calls to out sister branch through our VPN, we experience auditory packet loss symptoms.
I would think the VPN should only be affecting the encapsulation of the data. To my understanding the VPN packets and non-vpn packets all hit the router at the same time, and transport over the web in the same manner. Why would there be packet loss over only the VPN??
--Regarding QoS, if a standard layer 3 device receives a VOIP packet encapsulated in a VPN, do the QoS bits in the VOIP packet get acknowledged, or are they hidden by the VPN encapsulation?
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Oct 10, 2011
My PC is connected to a network with my company. My PC, only my PC, seems to get random and quick drops in internet connection but the connection to the network/domain remains active.
1 - Open Internet Explorer
2 - Receive "Cannot Display Webpage" message.
3 - Refresh page quickly and the page shows up.
sometimes step 3 takes 3 or 4 times, seems to be getting worse as the problem has been around longer, but most of the time a quick refresh works. Same thing happens with Pandora, my standalone player for Pandora will lose connection but come back with a quick "RECONNECT" button.So, as you can see, it's only dropping out for seconds, 1 - 30 seconds at the most, my thouoght is the Ethernet card??
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Jan 26, 2011
I support a small business with 6 computers(XP) wired networked to a Cisco router and connected to an ADSL WAN. For over a year now they have experienced an overnight loss of Internet connectivity requiring the router to be rebooted almost every morning. We thought it was a fault router so we replaced this with a good Cisco router, but the problem persisted. We got Cisco involved and they monitored it without finding fault, but they replaced it anyway. We also replaced our ISP but all without avail. I use a combination of pc.Any where and Log mein to support them over the web. The strange thing is that I am always able to connect to their system, but when the fault is apparent, I can't get web access to their router internally or externally and they can't get Internet or e-mail access. The router is my DHCP server and each PC is DHCP mapped in it. Cisco have looked at all the settings of the router and they say they are good.
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Dec 13, 2012
I'm having an issue with packet loss during the same time every day at 12:20PM. I checked scheduled tasks, ran wireshark, made a static ARP entry, and ran ping tests. The ping tests show packet loss only when pinging 1 DB server to 1 App server. When the packet loss happens everyone on the network connected to the DB gets kicked out of the DB. They are eventually able to reconnect but its annoying that everyday at 12:20pm they get kicked out. Ping tests from the DB to the Firewall stay constant. But when I ping from the App server to the DB it loses connection at 12:20pm and when i'm remoted into the DB server i get kicked out as well. It's like at 12:20pm the DB server stops incoming connections for some reason.
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Feb 3, 2011
I've just replaced my ZyXEL modem router with a Belkin Play N600 Wireless Dual-band Modem Router and eventually persuaded my PC to access the internet wirelessly. BUT I now can't access the Plextor StoreX NAS drive. I just don't seem to be able to locate it although it still works on other PCs on the network.I moved the 4 ethernet cables that were connected to the ZyXEL into the corresponding 4 slots on the Belkin so the format is exactly the same as before. That is cables to: The NAS drive Other PCs, printers, scanners etc etc on Network My PC Spare cable for non-wireless laptop connection. how I can get access on my PC to the NAS.At the same time the other PCs on the network (too far away for wireless access) now cannot get internet access, although a laptop connected to the spare cable can........
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Oct 25, 2011
While I am connected to the internet, whether surfing the web or playing a game, I randomly get disconnected with a "No Network Connection" error on the network access icon on my toolbar. However, other computers that are networked (both wireless and wired) do not receive a disturbance in the connection. When I refresh or look for a new connection, I continue to get the same error and the troubleshooting tools fails to find a fix. The only way this seems to fix is rebooting the computer. Sometimes it happens multiple times in a row, but consistently happens between 1-2 times a day.I don't know if this is a coincidence or not, but it seems to happen when I'm doing stuff that could "stress" the connection, like downloading something or running a game while also browsing the web[CODE]
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May 12, 2012
While playing the online game League of legends i suddenly lost internet connection. when loading pages some will not connect and I'll get a message saying I'm not connected and should try reloading, refreshing the page usually fixes the problem, occasionally multiple refreshes are necessary. I've never had this problem before and it's rather inconvenient for me as I need internet access for university.
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Mar 3, 2011
3 days ago it worked just fine but not anymore I've run a packet loss test and the result is 100% loss. I don't know why. The internet is really slow, it is unusual. I'm using wireless network. Oh, I'm using windows XP SP3 (laptop) I am not really good at computer and I'm wondering if this problem is caused by virus, malware of something like that.
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Apr 5, 2012
I have a Windows 7 desktop (so it's NOT wireless) that is having problems with packet loss. Now, the modem is fine, I've tested 'pingtest' on some laptops and the packet loss is very minimal. I've tried reinstalling the drivers for the LAN controller, using a different ethernet cable, using the 'winsock' reset command, and I have no luck. This does effect upload times on YouTube, to where a minute long video takes an hour.
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Jul 27, 2012
For the past day or so I have been having problems with my internet connection to my PC. It has been working fine for a few hours, then it suddenly goes down for up to 30 minutes, with sporadic (lasting about 30 seconds) reconnection during that 30 minute period.I am pretty certain this is a computer related issue (as opposed to a problem with the modem), as none of the other computers in the household. (Ihave been affected, and neither has the wifi (I have browsed on my phone while the internet on my computer was down, in fact am currently writing this post on the wifi while my computer has no access)My computers specs (Taken from the sys info program when I regained connection for a short while) [code] Steps I have already taken in an attempt to solve this problem
1. Reset modem (turned it off and back on again)
2. Ran most of a virus scan in both macafee and avg (they both got to about 85% and by that point were just scanning steam stuff
3. Talked to a verizon tech, confirmed it is most likely not a modem problem (he didnt know what the problem was however)
4. Changed out the ethernet cable, the new one works no better than the original
Additional note: Earlier today (after these problems had begun) I was downloading the latest version of hamachi from a site soft32.com when I recieved a trojan warning from macafee. I immediatly stopped the download, restarted my computer and began scanning with both AVG and Macafee, neither found anything of note (AVG found something it labeled a hidden directly, I looked it up and it seems harmless)
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Dec 15, 2011
I started using Windows 7, on two different computers. I get pretty bad lag spikes while using Skype and playing online games. They occur about once per minute and last maybe one second. There is a "Network Throttling" fix floating around the internet which I have tried, to no avail. I don't know much more about computers than a basic understanding, and am completely new to Win7.
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Apr 24, 2013
I keep getting a 50% loss on one workstation. I tried switching out the network card and that seems to have resolved the issue... Do network cards exhibit strange behavior when they fail or am I overlooking a deeper issue?
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Nov 17, 2012
Pinging 98.137.149.56 and had 100% packet loss; this was suggested in another thread. LAN connected at 100 Mbps BUT cannot access Internet! Windows XP HP desktop; Belkin N Router; Optimum Cablevision - Modem Scientic Atlanta "Webstar"
I am using my iPhone to access Internet.
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Mar 2, 2011
We have a tandberg 6000mxp on a network without QoS. We see packet loss on the tandberg counters and NOT on the network anywhere. A network trace also showed no errors.
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Jan 25, 2013
But I have finally diagnosed the problem. When I try to play games like Combat Arms, Arma II /OA, BF3 and run a ping test on pingtest.net my ping is steady, and my jitter is fine but the packet loss is ridiculous! I will have a packet loss of 90-100% causing the game to be unplayable. But when I run this test playing WoW I have 0% packet loss, steady ping, and good jitter. I am completely lost on what to do, other than contact my useless ISP that will not know what to do. I am really frustrated by this and am not sure what the cause of this is or what to do. I have been researching for over a week and have no where else to turn.
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