Re: Help needed with intermittent internet

w_tom wrote:
Meanwhile, Warren H's explaination - what the various IP addresses
are - should be obvious from client machines using IPCONFIG and
TRACERT commands. If problem is only on the router side, then
various computers on client side cannot ping each other. That test
result also was not reported.

He's using the server as his LAN router. The Netgear router isn't routing in the lay sense of the word. That is, in the topography of his network, it's not directing traffic here or there. It is only sitting there between his server (which is the real router on his LAN), and the cable modem, but it's opening packets, and repackaging them as a router does, and not simply passing them through as a bridge would.


Also not defined is whether modem is in router mode or bridge mode.

I can't find a model number for the piece of equipment, but giving this more consideration, I don't think it can actually be configured to be a bridge. I believe that it can only act as a router. It can act as a NAT router, or it can operate as a normal router. Not normal in the same since as a "home" or "broadband" router, which normally acts as a NAT router, but normal as in it routes packets to various public IP addresses. In this case, there's only one IP address to route to, but that doesn't mean the equipment stops opening packets like a router does, and turns into a bridge that doesn't open packets. (Remember that a router and a bridge operate on different levels of the OSI model.)

Also, if it were just a bridge, there's no ISP that's going to waste a publicly routable IP address on it. As a bridge, it's IP address would only be useful for managing the equipment, and would not be a part of the path through the device. For that, they'd use a private range IP address just like they do for the cable modem.

The more I think about this issue, assuming that everyone is reporting honestly, my confidence that it's not the cable modem, and that the failure is happening because something is crashing the router part of the Netgear box goes up.

--
Warren H.

==========
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