Loss of network access after sleep in Windows 7
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Loss of network access after sleep in Windows 7
04-07-2013 3:10 PM
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This has me baffled
When waking from sleep mode in Windows 7 usually, but not always, I can't see the local network but can access the internet.
A reboot of the computer always fixes it but disabling and enabling the network card (integrated in motherboard) doesn't neither does logging off and on again
Creating a Network map shows the computers attached to the network but doesn't show the router only the router media centre (this is a quirk from the USB connection on the router which isn't actually present on this model)
Router is a TG582n and power saving on the network adapter is disabled
Any thoughts
Re: Loss of network access after sleep in Windows 7
04-07-2013 3:18 PM
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Also I remember there was a issue with the icons, this MAY apply to you, have a read : http://support.microsoft.com/kb/937477/en-us
Re: Loss of network access after sleep in Windows 7
04-07-2013 3:22 PM
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I suspect that the critical item is that the network map doesn't show the router
This is what the network map shows when it is working - actual computer names have been hidden.
The router in the blue rectangle is what isn't there after waking from sleep
Re: Loss of network access after sleep in Windows 7
04-07-2013 4:36 PM
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As for tray icons I've a little batch file on the desktop of my W7 PC to restart explorer.exe with an icon in the Quick Launch area:
@echo off
taskkill /f /IM explorer.exe
start explorer.exe
Re: Loss of network access after sleep in Windows 7
04-07-2013 5:31 PM
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Also, while the icon for other computer does not appear in explorer, is it accessible if you put the name (or ip address) in manually into explorers address bar (e.g. \\technicolor).
Re: Loss of network access after sleep in Windows 7
04-07-2013 5:34 PM
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Quote Use this Security Level to allow all outgoing connections and block all incoming traffic. Game and Application sharing is allowed by the firewall.
Re: Loss of network access after sleep in Windows 7
04-07-2013 6:18 PM
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Re: Loss of network access after sleep in Windows 7
04-07-2013 6:19 PM
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I wonder if a firmware update would help - somehow I doubt it
Re: Loss of network access after sleep in Windows 7
04-07-2013 8:15 PM
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My thoughts too. AFAIK the firewall operates at an IP level, Windows 7 Network mapping uses LLTD (Link Layer Topolgoy Discovery) which is a Level 2 protocol so should be nowhere near the firewall. On a TG582n It should be handled by the internal network switch that connects the four physical ethernet ports or maybe the 'bridge' connecting the logical ethernet ports and the wlan.
Quote You would not expect a router firewall to have much to do with the internal network, but then this is a technicolor router.
Jim, I'm intrigued as to what's going on, would you be interested in trying something for me ? rather than disable the firewall could you try changing the bridge filtering settings
from the telnet cli try
you can put it back to normal using
Quote eth bridge config filter=none
Quote eth bridge config filter=no_WAN_broadcast
See if that makes any difference...
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Re: Loss of network access after sleep in Windows 7
04-07-2013 8:38 PM
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Will now need to reboot to get the network back
Re: Loss of network access after sleep in Windows 7
04-07-2013 9:00 PM
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Re: Loss of network access after sleep in Windows 7
05-07-2013 8:44 AM
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You mean none at all, not just a lack of the TG582 ?
Quote The only difference is that there are no discovered devices on the network map
Do you have just one W7 and an XP computer on the network ? and does the XP system have the LLTD responder installed ( don't think its standard on XP )
I can't discover whether the TG582 has an LLTD responder or not, presumably it must have something as Windows seems to have got some details about it...
possibly.. The really strange one is, as you said earlier, what has it got to do with the firewall ?
Quote Maybe something to do with the igmpsnooping?
The other question is 'why should it matter that network discovery isn't showing the router' ? surely if the Win 7 system has the correct IP address it shouldn't have any problems accessing the local network ?
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Re: Loss of network access after sleep in Windows 7
05-07-2013 9:39 AM
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LTTD responder was installed on the XP computer otherwise it wouldn't appear on the network map at all - I did this when I first went to Vista before upgrading to Win7
Like you - but from a position of greater ignorance - I really don't understand why the TG582n does it. However when I was using the Netgear DG834G v4 (no longer used as it was rapidly failing) it did happen very occasionally for no apparent reason but when it did the XP computer couldn't see the Win 7 computer either. This may well be a red herring as the reason the Netgear failed was on the LAN side not the WAN side.
Re: Loss of network access after sleep in Windows 7
05-07-2013 10:08 AM
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not sure that's true Jim
Quote but from a position of greater ignorance
I think I need to go a read a little more about LLTD, see if I can understand more about how it works in detail...
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Re: Loss of network access after sleep in Windows 7
05-07-2013 10:25 AM
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