SMCD3GN - New NIC Losing Internet At Random Times?
Jan 29, 2013
I've been having some problems with my new custom built computer connected wirelessly to my Router. My router is an SMCD3GN. So it is a Router/Modem in one. I am currently using the Linksys AE3000 Wireless-N USB Adapter. I have had a past Wireless USB Adapter, & an internal Wireless network card. The USB quit working & in order for me to get it to work is I have to reinstall the drivers everytime I turn my computer back on. The internal wireless network card would randomly lose internet every 30mins - an hour. Being a gamer, this is very frustrating. So, right now I am using the Linksys USB, and I was just playing a game & talking to some friends on skype & I would lose internet for 2 seconds then it would automatically reconnect. So I am beginning to think that it might be my Router but I tried my USB on my laptop for like 10 mins (I disabled the internal wireless network adapter) & I went into cmd.exe and pinged google for about 10 mins, & it said "Request Timed Out." several times.
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Dec 29, 2012
Network running about 60 computers, most of which are running windows 7 professional. Some are on a domain, some are not.At (seemingly) random times, some computer on the network will lose the ability to browse websites (including the web interfaces of networked devices). I can't identify what circumstances cause this to occur. I only find out about it when someone calls me.From the affected computer:I can ping sites I can ping our Cyberoam UTM (which acts as our DNS, DHCP, and firewall)disabling/enabling connection doesn't fix the problem releasing/renewing ip doesn't fix the problem flushing dns doesnt fix the problem uninstalled antivirus on two test machines, problem still randomly manifests.replaced the Cyberoam with newer model users have claimed that if they wait a long period of time (40+ minutes) the problem sometimes resolves.rebooting the computer resolves the issue until it randomly occurs again changing the computer's mac address also resolves the issue until it randomly occurs again.
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Oct 26, 2012
I have fiber optic Internet with static ip and keeps disconnecting at very random times. It started 3 weeks ago, before it worked perfect. Most of times dcing 3 times per hour. But sometimes working for hours without dcs. Usually disconnects only for half minutes then reconnect, it can be very annoying. The provider keep saying that need change router. I'm tried three different of routers already, but keeps disconnecting. I'm tried connect the net directly into my cpu, without router, but not worked, dc-ing too. I tried ping the default gateway when its disconnected, and its saying: request timed out.What else can i try? It should be, that the provider has too many clients, and their router collapsing?
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Feb 17, 2011
I have a brand new Dell laptop running windows 7 connected to a sky router wirelessly. My internet connection randomly just drops. At 1st I could just click on the yellow triangle and troubleshoot and it would reset the network adapter. I cannot do that now - Im having to disable the adapter and the enable it and Im back on the internet.I have set it up so I am connecting via a manual IP address as I wondered if when the kids PS3 was connecting it was pinching my Ip address.
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Apr 30, 2011
isp is Comcast. They have had 2 techs come out here to look at problem and found nothing. I'm on a wireless connection with router in the next room. Modem was replaced a week ago and still problem persists. Landlady says she has no problem (shes the one in the next room and is connected directly) but I think that because she doesn't notice (I play online games so its very noticeable). I have excellent signal from router. This is my report:
Windows IP Configuration
Host Name . . . . . . . . . . . . : *****
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Unknown
IP Routing Enabled. . . . . . . . : No
[code]....
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May 16, 2011
It started rarely, now it happens alot! the only way to get internet back is if I unplug the power cord from my STUPID router.
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Oct 14, 2011
I check all of the settings and changed the channel to see if it works. For some reason it disconnects my wireless internet at random times and i know before it never use to do that before with a older router. There is nothing blocking it, it worked before, and my computers can connect except two. The only thing i can guess is my wireless card.
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Jul 22, 2012
The router is being good so far. I have a Belkin Wireless G Plus MIMO router with windows XP operating system. This has been going on for a couple of weeks now and I really want it to stop because it is stopping me from doing things that require the internet.
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May 9, 2012
We recently moved and upgraded our internet service from 1.5 Mbps to 4Mbps with CenturyLink. However, since our service was activated last Thursday, the internet connection intermittently drops and will not recover unless I reboot the modem. The period of up-time will last anywhere between fifteen seconds to several hours, usually falling along the five-to-ten minute range. No difference when using ethernet/wifi. The DSL light stays on, and the Internet light remains on as well.
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Nov 25, 2012
I keep getting random moderate Nat sometimes, other times its opened. I have made a static Ip and port forwarded 4 ports that xbox uses. 88 udp..3074 both...53 both...80 tcp... Now when i test my connection on the xbox dashboard a message will come up saying make sure my UpNp is enabled, which it is and it tells me to make sure port 3074 is enabled which it is. I have restarted both my modem and router multiple times to try and fix this.
I have a linksys cisco e4200 and I recently updated its firmware which i thought would possibly fix the problem.I have talked to linksys but no luck.I have talked to my internet Cox Communication but they tell me its the router and i believe it is because when i directly connect my xbox to the modem i never get the moderate Nat. I have also talked to Norton about my virus protection because I thought maybe it was blocking some ports, but they disabled it and I still get the message.
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Nov 7, 2011
We have a bunch of computers(70 aprox) connected to a domain. Since couple weeks ago very strange issues started occuring, internet and network access(path to network share is lost) would come up at random times and on different machines and would last for about 10-20 seconds it would re-connect again.All the computers are using private addresses.Most machines are windows 7, some are xp.Using Windows server 2003 as dc.Since the occurance is so random it's very hard to pin point the cause.
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Mar 24, 2013
We have about 15-20 APs out in the field, and at random they seem to disassociate from the WLCs and re-associate within a few minutes. We have not looked into that entirely yet, but we are having an issue with a few. Sometimes, they will disassociate and after a few hours reassociate.
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Jun 20, 2012
Since about 3 weeks ago my DSL has been getting totally random ping spikes, from under 40 to over 1500MS for minutes to hours on end. Nobody else is using my internet, I've verified this. There is nothing sucking up bandwidth on any connected device or computer, as far as I can tell through troubleshooting to the best of my ability. I tried switching to a Cisco X2000 modem/router combo and it did nothing, still totally random latency. Also, when I called AT&T about this, they didn't even know what ping was. They ran an upload/download speed test (which is still mostly consistent regardless of latency) and told me I was basically making the issue up.
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Dec 16, 2012
I have a 2911 router hanging/freezing at random times, could work fine for a week then crash, or sometimes, could only go a few hours, completely random with timing. The onyl fix is to manually pull the power and reinsert.When this happens, all services/access stop working, including nothing on console access.This was on 15.2.1.T1 which im aware, has a few bugs, so i upgraded to 15.2.1.T2.The issue continued, so I swapped out the 2911 with a brand new one. The issue is still present.
One interesting thing, is when the router crashes/freezes, all lights appear to remain on working as usual, but when i unplug any of the ethernet links, the lights still continue to remain flashing and on for the ethernet LEDs, even once i have fully removed the cat6 cable.
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Mar 12, 2011
i have an acer laptop an iphone and an xbox360 running on my connection not always all at once but my connection just randomly cuts out at any point whenever im on xbox live i get disconnected and i look at the router and its just resetting itself and i have to go and reboot it or just reset it and wait a wile before it will come back on. but even when it is on its not for long before it goes off on its own
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Jun 12, 2011
my internet has recently been spiking every 10-15 seconds constantly. Wired and wireless both experience the spike. My modem is SMCD3GN-RRR. Heres a ping to google.ca: I've called my ISP and they said everything was fine after they ran some tests. What could be causing this and how can I fix it?
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Nov 10, 2011
The wireless drops specifically from my laptop constantly at random times. When the wireless drops in order for me to be able to reconnect i have to restart the router itself. There are also random times where the Wi-Fi stops broadcasting altogether. I have a computer connected via Ethernet and it does not lose connection during these times. All the computers are running Windows 7 and the Router is up to date on firmware.
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Feb 8, 2012
Had an E4200 for a couple of months now and have not been able to resolve an issue with the router dropping an Apple iPad 2 at random times.The E4200 is replacing a Cisco Aironet 1200, which never dropped any clients, iPad 2 or others, and never displayed any of the issues below.
TECH DETAILS:The E4200 is being used purely as an access point. All extras are not in use and are disabled.
Firmware 1.0.03
Hardware version 1.
BASIC ISSUE:The E4200 drops an Apple iPad 2 off the 2.4 Ghz Mixed (B, G, N) network. The user must then select the network to rejoin. Rejoining occurs without incident. The same issue occurs when the network is restricted to B, G. The drops occur at what appears to be random intervals - sometimes 10 minutes apart, sometimes hours apart. We can have as many as 6 drops in an hour. A ping to the apple ipad shows the device stops responding to pings about 10 seconds before the user is prompted to rejoin a network. Meanwhile, a ping to the E4200 itself from a laptop connected via the E4200 on the same radio as the ipad continues to work without fail during this incident.
1. The iPad 2's cannot connect to the 5Ghz radio. I believe iPad 2's are supposed to support 5Ghz.
2. Both our Apple TVs do not connect to the 5Ghz radio: they fail with a "There was an error connecting to the network. Check your settings and try again. (-3914)" error. Apple TV supports 5Ghz.
3. The admin interface for the E4200 is very slow sometimes. Probably over 20 seconds to render some pages when it gets really bad. As a comparison, Internet-based pages on fast sites that delivered via the E4200 itself load in less than 2 seconds.
4. The HTTPS version of the admin interface can only be connected to via Safari browers. Both Internet Explorer 9 and Chrome 16 fail to connect with a "Connection reset" error. In Chome, it says "Error 101 (net::ERR_CONNECTION_RESET): The connection was reset." This is across multiple devices. There is no issue with straight HTTP.
All other devices - including Macs and PCs - connect fine with the E4200 on both 5Ghz and 2.4 Ghz radios, even if they cannot access its admin interface via HTTPS.I've presented quite a few issues above, but the main one is the drop outs for the iPad 2 devices. I'd present logs on drops, but the thing doesn't record any useful logs.
Basic wireless config:
5Ghz:
Network Mode: Wireless-N Only
Channel width: Auto (20 or 40 Mhz)
Channel: Auto (DFS)
SSID Broadcast: Enabled
[URL]
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Oct 22, 2012
We currently have around 150 2975 switches and have had problems with it them not handing out PoE power to the cisco phones and access points at random times. There is plenty of power left for the switch to use. We have at least 15 that will be running fine for about a week and then all of the devices that use PoE power will shut off and will not come back on until we reload the switch. If you console in there aren't any messages that pop up and if you look at the port it just shows on connected or will show IeeePD in the power inline. We have contacted Cisco TAC and they just RMA them.
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Aug 3, 2011
I just bought a SG200-18 in order to use LAG between a backup server and multiple computers and servers. Servers are supposed to all use 2 links and computers only 1.
As soon as I activate LAG on port 2 and 3, no matter what is connected on the switch I lose access to the switch interface (luckuly, it's still working on port 17 for a strange reason) and all computers / servers connected are randomly losing the network access. Everyrhing start to be slow but most servers and computers don't lose access to the internet. Browsing a web site will suddenly take ages but... it will work eventualy.
I already used LAG on other switch without a single issue.. The only uplink I have is to the router and I know that I don't have any issue with network cables....
So what am I doing wrong ??? I didn't even try to configure the TEAMING on the servers, just creating LAG on the switch will kill everything Oo.. I'm starting to think that my SG200 is dead out of the box.
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Jun 29, 2011
I cannot successfully forward ports on this router, I've tried a few things but I can only assume the firmware is bad. I've already looked around for a solution but everyone says they solved it by just getting a different router (which at the moment isn't an option).
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Jun 1, 2012
I have an SMCD3GN which I put into bridge mode a while ago and used it as a modem alongside my Linksys WRT54G router. But the SMC is capable of Wireless N, while the Linksys is only capable of wireless G.So I want to turn my SMC into a router + modem again, but I can't figure out how to do it. I tried resetting to factory defaults by holding the reset button at the back of the unit for 30 seconds but it didn't work.I can get it to work with a wired connection, but when I type ipconfig /all into CMD, it doesn't show any default gateway, so I can't access the router online. I've tried various different IPs like 192.168.1.1, 192.168.0.1, etc., but none of them work.
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Mar 30, 2012
I've been having an issue recently which is causing my internet to disconnect for under 20 seconds 1-5 times a day. This can be troublesome when online gaming, as I am normally disconnected from the server.
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Mar 13, 2013
I have an ADSL 2+ connection that constantly seems to be dropping at random intervals for no particular reason that i can tell anywhere from 3 to 20 times a day for over 6 months.I have a Dlink DIR-300 router which connects hard 2 pcs and a wirless connection that host for 4 devices , the Router is connected to my Dlink DSL-502T Gen 2 ADSL 2+ Router.I'm constantly having to disconnect the power wait 5 minutes and reconnect the power to get everything back online. From what i can tell the main problem is the DIR-300 router, ive checked it has the latest firmware, reset the router from factory, tested it with less connections, called up my ISP and checked everything was good on there end but to no avail[CODE]
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Aug 12, 2012
Who is your Internet Service Provider (ISP)? India- AirtelWhat type of Broadband connection are you using? DSLWhat is the exact Make and Model of your Modem, Router or Modem/Router Please refer to this page with detailed specs: Brand New Beetel 450TC1 Wifi Wireless Modem Router DSL ADSL 2+ BSNL AIRTEL MTNL | eBayWhat is the Name of the Anti-Virus, Security or Firewall Software installed from the problematic computer -Microsoft Security Essential. i have tried uninstalling the antivirus software but no effect!The issue is when i click any link online it displays the following message. Then i go back and do this 3-4 times till its able to load the link.I have had this issue with other browsers. Mostly i use Google chrome. This issue is with wired and wireless connection both.PS: My router is transmitting 2 ssid's at the same time. I am unable to change it.
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Jun 25, 2011
My internet connections drop frequently am still able to go on the router website when the internet drops is the router timing me out or what i have a net gear ive tried disabling passphrases?
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Jul 25, 2011
I have a wireless router and my internet is constantly disconnecting. Sometimes it will show "connected" but will also say "no internet access". I probably have to unplug router and modem at least 5-7 times a week. Could this happen because I have too many things using the router at once? We have 4 laptops, 2 iPhones and 2 iTouches, plus often using PS3 and Wii. We use Time Warner DSL.
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Mar 14, 2011
What are the causes of internet slowness?
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Mar 22, 2012
btw- I don't know all the correct technical terms, so I will try to describe them as best as I can.
My internet at home keeps disconnecting. It disconnects when I go upstairs (we have a small house), it disconnects when I'm more than 5 meters away. Sometimes when I'm right next to the modem it disconnects. But not only does it disconnect, it also ask me once again for my internet password (as it is protected with one).
Things I've noticed:
-This has been going on for some while (about a year ... I'm a really patient person). It does it with my and my brother's macbook Pro (Mac Os X 10.5.8) but it doesn't with my father's Toshiba
-We switched to bell's fibre optic, so the modem should be working fine
-my internet works beautifully when I'm at my grandmothers house (who also has the new Fibre optic) and works well at my school's university
-Once a few months ago I decided to do some searching and found out that my computer kept changing some kind of IP name or whatever (not sure exactly what) but it kept saying: "BELL_account_name_0 has disconnected so it reconnected to BELL_account_name_1", and then _2, _3 once I found it was up to _150 !!
I am pretty handy with computers but I'm not used to Mac's settings. Everytime I try to do the Network Diagnostics sometimes it works first shot, sometimes I have to re run the same Diagnostics and it will work 20 tries later (like I said I am patient). But I know that Network Diagnostics is NOT THE ANSWER. It's just a temporary patch, I want to solve this problem completely so I won't have to deal with it in the future.
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Feb 4, 2011
We use our internet to watch Netflix. We have had no problems until recently, I called the satellite Internet company(which is a local co.) they told me my router was going out. I bought a new one, problem solved, my husband told me my neighbor just got Internet and has been playing Xbox everyday which coincidently is between the 5:30pm to 10ish pm we have been having issues with our router. What can we do to fix this? Do I have to buy a bigger router?
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Jan 3, 2013
My internet connection is being dropped multple times a day. I have to run the troubleshooter each time and the connection is restored. How do I figure out if this is some setting in my wireless adapter or if it is the wireless adapter itself?
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Feb 18, 2012
I am experiencing random disconnects from the internet -- they have been occurring about 1-3 times per day, although I've just had four in the last 20 minutes.
ISP: Wow! Cable - 15/1Mbps
Modem: Motorola SB6121 (new)
Router: D-Link DIR-655 (new) Firmware 2.00NA
When the internet disconnects:
- Both the LAN & the WAN are affected, but I do not lose any wireless connectivity with the router itself.
- I am able to log into the router wirelessly but cannot access the modem.
- If I plug my laptop directly into the modem, I can connect to the internet.
- When I reboot (using the on/off switch on the surge protector), everything comes back up.
There are a couple of other wireless routers nearby with fairly strong signals, but they appear to be running on different channels.
My phones are DECT 6.0, so there shouldn't be any interference problems with those.
I've been poking around this forum, and have already made some setting changes that seem to be consistently recommended:
- Ensured DNS IP addresses are being filled in under Setup/Internet/Manual
- Turned off ALL QoS (DIR only) GameFuel (DGL only and if ON.) options. Advanced/QoS or Gamefuel.
- Turned off Advanced DNS Services
- Turned on DNS Relay under Setup/Networking.
- Setup DHCP reserved IP addresses for all devices on the router.
- Ensured devices are set to auto obtain an IP address.
- Set Firewall settings to Endpoint Independent for TCP and UDP.
- Using mixed G and N signal mode
- My security setting is WPA-Personal. WPA2-PSK
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Dec 27, 2012
I have Windows XP Pro SP3. After a random period of maybe 30 mins to a few hours, my internet connection seems inexistant. PC reacts like there is no internet cable plugged in. I've checked the ipconfig command in command prompt before my internet shuts down and after and there was a change. A few lines(IPs) were missing after my internet fell.
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