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#1
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Cable Modem Problem(?)
I recently purchased a new cable modem - Motorola MB7420 - and with my
Windows-10 system I went merrily along. I also have an image of Windows-7 which I use sometimes when I want to play certain games. When I install the Win-7 image I'm having a problem(?) connecting to the Internet. It take 2 to 3 minutes (I timed it) for the internet to be recognized. The connection icon (on lower right) -when rebooting - has the revolving blue circle and then a red x overlays the icon. When I put the mouse pointer over the red X and right-click I get the small window that asks "Troubleshoot... and Open Network & sharing..." When I open the Network & sharing windows, Windows-7 automatically tries to correct the connection problem which it finally does. Any ideas what's wrong or why it take 2-3 minutes for Win-7 to finally make the connection? Windows-10, zip-zap, no problems whatsoever. |
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#2
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Cable Modem Problem(?)
jimrx4 wrote:
I recently purchased a new cable modem - Motorola MB7420 - and with my Windows-10 system I went merrily along. I also have an image of Windows-7 which I use sometimes when I want to play certain games. When I install the Win-7 image I'm having a problem(?) connecting to the Internet. It take 2 to 3 minutes (I timed it) for the internet to be recognized. The connection icon (on lower right) -when rebooting - has the revolving blue circle and then a red x overlays the icon. When I put the mouse pointer over the red X and right-click I get the small window that asks "Troubleshoot... and Open Network & sharing..." When I open the Network & sharing windows, Windows-7 automatically tries to correct the connection problem which it finally does. Any ideas what's wrong or why it take 2-3 minutes for Win-7 to finally make the connection? Windows-10, zip-zap, no problems whatsoever. The Windows networking interface carries out a pretty simple test. Microsoft has a server on the network, that the network interfaces use for test purposes. The address is symbolic, so first the test tries to do a DNS lookup. Next, the teeny-tiny file on the server is fetched as a test. The file only contains a couple words, which the test uses as verification that the network interface is good. You might see the blue circle until that sequence is completed. This might mean, on a typical day, the Microsoft gets to "see" 500 million computers boot. Since minimal info is exchanged, this is not your usual pushy telemetry. It's just a simple kind of ping-like test. And allows the desktop to put up the "healthy network" icon. The troubleshooter can reset the networking stack, using the two popular "netsh" commands you see mentioned in this group occasionally. The router may be having a problem getting the details from the ISP. The ISP runs a DHCP server. On request from the router, it gives the router an IP address, and it gives the router two DNS server addresses to access. In turn, the router has its own DHCP server, and it serves local addresses like 192.168.0.1 to your LAN machine. This all assumed the cable modem does the following /----- combo box --------\ DOCSIS WAN LAN Cable------ modem ------ router ---- ---- ---- ---- The WAN side uses the public ISP IP address. The LAN side uses the private IP addresses dished out by DHCP running on the router. If you "bridge" the cable modem, the router is disabled... Similarly, if you had an older unit, it might just be a modem. The output of bridged things, can be PPPOE, and then a username/password is required to "log into" the ISP. Windows 7 can sniff this situation, and it will use its PPPOE termination stack. Seeing a public address in "ipconfig", would confirm the usage of PPPOE (like if someone else set it up and you were "just a victim"). DOCSIS Cable------ modem ------ PPPOE --- Win7 terminates PPPOE Machine has a *public* address, outside the 192.168.x.x or 10.x.x.x range. I expect your cable modem, is a combo modem/router, running in "normal mode", and the first diagram applies. ******* Note that some network failures, are the result of subsystems in the OS. For example, the networking stack uses .NET libraries. (The similarity of names there is purely coincidental.) Some executables need "runtime compilation" after a .NET update. On WinXP, the firewall in particular, can foul up after a .NET update and there is an "ngen" command to force the .NET assemblies to be recompiled. This can take around ten minutes, to do all the system executables which have .NET dependencies. This isn't likely to be the reason on Win7 (it doesn't have this "ngen bug"), but I mention the subsystems as potential culprits. (There can be a pregnant pause until this baloney is finished in the background.) In addition, malware that upsets certain networking stack settings, could also be responsible for fouling up the connection, and then the "netsh" commands the Troubleshooter uses, kinda sorta makes it work again. You could be connecting via IPV4 or IPV6. I'm IPV4-only here, so I cannot comment on the early morning dynamics of IPV6 coming up on a broadband device. I presume Microsoft still does the same "basic networking test" for the "healthy network" icon to show. Paul |
#3
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Cable Modem Problem(?)
Wow. Thanks for the info. Now I need time to digest this.
I appreciate your response. "Paul" wrote in message news jimrx4 wrote: I recently purchased a new cable modem - Motorola MB7420 - and with my Windows-10 system I went merrily along. I also have an image of Windows-7 which I use sometimes when I want to play certain games. When I install the Win-7 image I'm having a problem(?) connecting to the Internet. It take 2 to 3 minutes (I timed it) for the internet to be recognized. The connection icon (on lower right) -when rebooting - has the revolving blue circle and then a red x overlays the icon. When I put the mouse pointer over the red X and right-click I get the small window that asks "Troubleshoot... and Open Network & sharing..." When I open the Network & sharing windows, Windows-7 automatically tries to correct the connection problem which it finally does. Any ideas what's wrong or why it take 2-3 minutes for Win-7 to finally make the connection? Windows-10, zip-zap, no problems whatsoever. The Windows networking interface carries out a pretty simple test. Microsoft has a server on the network, that the network interfaces use for test purposes. The address is symbolic, so first the test tries to do a DNS lookup. Next, the teeny-tiny file on the server is fetched as a test. The file only contains a couple words, which the test uses as verification that the network interface is good. You might see the blue circle until that sequence is completed. This might mean, on a typical day, the Microsoft gets to "see" 500 million computers boot. Since minimal info is exchanged, this is not your usual pushy telemetry. It's just a simple kind of ping-like test. And allows the desktop to put up the "healthy network" icon. The troubleshooter can reset the networking stack, using the two popular "netsh" commands you see mentioned in this group occasionally. The router may be having a problem getting the details from the ISP. The ISP runs a DHCP server. On request from the router, it gives the router an IP address, and it gives the router two DNS server addresses to access. In turn, the router has its own DHCP server, and it serves local addresses like 192.168.0.1 to your LAN machine. This all assumed the cable modem does the following /----- combo box --------\ DOCSIS WAN LAN Cable------ modem ------ router ---- ---- ---- ---- The WAN side uses the public ISP IP address. The LAN side uses the private IP addresses dished out by DHCP running on the router. If you "bridge" the cable modem, the router is disabled... Similarly, if you had an older unit, it might just be a modem. The output of bridged things, can be PPPOE, and then a username/password is required to "log into" the ISP. Windows 7 can sniff this situation, and it will use its PPPOE termination stack. Seeing a public address in "ipconfig", would confirm the usage of PPPOE (like if someone else set it up and you were "just a victim"). DOCSIS Cable------ modem ------ PPPOE --- Win7 terminates PPPOE Machine has a *public* address, outside the 192.168.x.x or 10.x.x.x range. I expect your cable modem, is a combo modem/router, running in "normal mode", and the first diagram applies. ******* Note that some network failures, are the result of subsystems in the OS. For example, the networking stack uses .NET libraries. (The similarity of names there is purely coincidental.) Some executables need "runtime compilation" after a .NET update. On WinXP, the firewall in particular, can foul up after a .NET update and there is an "ngen" command to force the .NET assemblies to be recompiled. This can take around ten minutes, to do all the system executables which have .NET dependencies. This isn't likely to be the reason on Win7 (it doesn't have this "ngen bug"), but I mention the subsystems as potential culprits. (There can be a pregnant pause until this baloney is finished in the background.) In addition, malware that upsets certain networking stack settings, could also be responsible for fouling up the connection, and then the "netsh" commands the Troubleshooter uses, kinda sorta makes it work again. You could be connecting via IPV4 or IPV6. I'm IPV4-only here, so I cannot comment on the early morning dynamics of IPV6 coming up on a broadband device. I presume Microsoft still does the same "basic networking test" for the "healthy network" icon to show. Paul |
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