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[legolad]

Okay, I've been reading through a lot of posts where folks are randomly losing their connections, but none of them mention a single port or a secondary switch, so I think this problem may be different.

Here's the story:

We have both a DGL-4500 router and a DGS-1016d switch. We connect to the internet via a Motorola 4G broadband modem from Clearwire. The connection goes like this:

Internet ==> 4G Modem ==> Linksys VOIP box (SPA2102-R) ==> (WAN port IN) DGL-4500 (Port 3 OUT) ==> (Port 5 IN) DGS 1016D ==> various ports OUT to PCs, PS3, Echostar satellite boxes, etc.

There is also 1 PC connected directly to the DGL-4500 router (i.e. not going through the switch like all the other devices.

About 3 -5 times a week the connection from the DGS-1016d to the DGL-4500 goes dead. When this occurs, all devices in the DGS-1016d switch lose their internet connection. We see no light on Port 5 of the DGS-1016D (this is the port that goes to Port 3 of the DGL-4500).

The PC which is connected directly to the DGL-4500 retains its internet connection. The VOIP box and the 4G modem continue to function normally.

The DGL-4500 firmware is at 1.15

I can pull logs and other stuff. Just tell me what you need.
Many thanks.

[FurryNutz]

What happens if you move the cable on the 4500 LAN port that goes to the DGS from it's current port to a different port on the 4500 and the DGS? Can you remove the DGS from the system and connect directly to the 4500 with other devices for a test and see if they loose connectivty. I have seen issues with switches going bad and seen a couple of 4500 ports go bad eventually. I would take the switch out of the loop to test and see if everything works. It seems like that if the one pc directly connected to the 4500 maintains it's connection and everything on the DGS looses it, I would venture to guess the switch could be going back. I would try other ports on the DGS as well. Try a different switch. Let us know how it goes.

[legolad]

Thanks for your quick response, FurryNutz (did you choose that because you knew it would make people feel a little dirty when they typed it?   )

What happens if you move the cable on the 4500 LAN port that goes to the DGS from it's current port to a different port on the 4500 and the DGS?

We have switched the LAN cable to different ports on the DGL-4500 and on the DGS-1016D.
Changing the port on the DGS never fixes the problem.
Changing the port on the DGL sometimes fixes it (causes the link light to come on at the DGS).
Rebooting the DGL always fixes the problem.

Can you remove the DGS from the system and connect directly to the 4500 with other devices for a test and see if they loose connectivty. I have seen issues with switches going bad and seen a couple of 4500 ports go bad eventually.

We have removed the DGS from the system and everything works fine on all ports of the DGL. No connection loss on any port.

It seems like that if the one pc directly connected to the 4500 maintains it's connection and everything on the DGS looses it, I would venture to guess the switch could be going back. I would try other ports on the DGS as well. Try a different switch. Let us know how it goes.

I think you mean the switch could be going "bad" yes?
I guess that's possible. It is only about 9 months old (we bought the switch and router at the same time) and this problem is relatively new (started about 2-3 weeks ago).

If you think I need to return the switch, I can do that.

It just doesn't feel like that kind of a problem. It seems more like something in the way packets are being handled between the two units - like maybe the DGS is somehow overloading the port on the DGL. I've heard of certain settings like multicast setup causing stuff like this, but I have no idea how to troubleshoot something like that.

Is there something I can look for in the logs or should I just give up and send it back?

[FurryNutz]

I might try this...do a factory reset of the router after you save off the current configuration file on the DGL router to your PC/desktop. If you have done any user configuration to the DGL, the factory reset will wipe these out, so save off the file. If your not concerned about that then just do the factory reset found under advanced/system. I'm leaning towards it possibly being the switch since you said you took it out of the loop and everything worked. You could try shutting off Mulicast streams under Advanced/Advanced Networking and see if this might help, however I doubt it. Usually that is on for doing video streams and things like that off the Internet that broadcasts data in that manor. Mines on however I don't have the same switch. Mines a HP 24port Gb switch. Try the factory reset and go from there. Any chance of borrowing a different switch? Let us know how it goes.

[legolad]

I'll try that tonight. I could borrow a switch and see what happens. Heck , I might just get one from Best Buy and return it later.

I'll let you know how it goes. Thanks again.

[FurryNutz]

Sounds Good, Ya, try something different if you can. Can always return it for a refund. This will help narrow the issue down. Let us know. Hope it works. 

[Trikein]

I don't think its the port on the 4500 that is going dead. I think its the switch shutting down port 5 after certian set amount of time due to inactivity. I went through the manual and couldnt find a way to adjust or turn it off, but I did find this.

Power Savings by Number of Connected Ports and Link Status
Computers do not require Internet access all the time; neither do switches utilize all ports at all times. When a computer or network equipment is shut down, switches often remain on and continue to consume considerable amounts of power. With D-Link Green Technology, D-Link switches can automatically detect link status and reduce power usage of ports that are idle. Computers or any connecting parties set to standby mode (not power off), however, will not provide significant power savings.

On it's feature list. As a easy work around, try a:

Code: [Select]

ping -t <insert ip here>from your command prompt on the PC that is connected to the switch. I would bet the problem would go away.

[FurryNutz]

Kewl, didn't know that this switch was a Green Weenie. LOL. Well that would certainly could cause an issue. Wonder why it's not coming back to life with signals are applied. Well, hope a different switch might help in trouble shooting and that ping test. Whats the -t for?

[Trikein]

Continual. Keeps pinging until you control+C