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ADSL router (EA-715) disappearing off the network

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Last Modified: 2013-11-29
I can't figure this out, and I'd love some suggestions.  The case is a small office LAN, about a dozen machines, mostly 98/XP.  They have an NT4 server, running file sharing, which also runs WINS and DHCP for the network.

They have a generic small ADSL router (a Turbocomm EA-715... no, me either) with an integrated four port hub.  They also have a larger Netgear hub, so in fact the uplink port on the router is just connected to the other hub.

The network uses 192.168.7.x addresses.  The router is 192.168.7.1 (static), and the server is 192.168.7.2.  The DHCP hands out addresses from 192.168.7.3 - 192.168.7.250 to everyone else.

Until recently everything worked fine, but they have a problem where they lose internet access.  This happens intermittently, usually several times a day.  I managed to look at the system when it was glitched, and I could not ping the router.  The DSL Link light was on, and the activity light for the hub uplink port was blinking, but it would not respond.

Since all access is usually via web config, this makes life tricky, so the normal solution is just to toggle the power, which brings it back.  The unit does have a serial port, so I am trying to find a serial cable so that if I can catch it again while glitched I can try and interrogate it.  Just to add to the annoyance, it seems to delete all error logs when you toggle the power.  I am trying to find downloadable manuals for it but without any major success (only a quick user guide so far).  Oh yeah, it does appear to have the latest firmware.

So, other than the box crashing, can anyone think of anything I am missing, or anything I can try to pin down the problem?


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Try attaching a machine directly to the router 4-port hub. Thus you can test if you can talk with the router bypassing the netgear hub.
Also you can run a packetsniffer on the machine directly attached to the router (assuming it's not a switch) and see if packets are actually reaching the router (and being answered).

Author

Commented:
The router was right next to a Tektronix Phaser laser printer, which was installed around the time the problems started.  I relocated the router away from other equipment, and so far the problem hasn't recurred.  I'll have to leave it a while longer before I can conclude that this was the problem though.

Thanks for your input lbertacco -- if this doesn't solve it, your idea sounds like a good next step.
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