Re: IP assignment by DHCP failure
From: Kent W. England [MVP] (kwe_at_mvps.org)
Date: 08/22/04
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Date: Sun, 22 Aug 2004 10:11:37 -0700
anonymous@discussions.microsoft.com wrote on 20-Aug-2004 5:00 PM:
> I have been using Alt Conf tab to assign a static IP
> which allows me to communicate with other PC's on LAN but
> it will still not connect with the internet.
When you use the web interface, you must stick with the same user name
or we can't tell who you are. If you are Chris, the original poster,
then this comment makes sense. If you are someone else, this comment
means nothing in Chris' thread.
Chris says that DHCP doesn't work but an alternate static address will
work on his LAN. Assuming that the other PCs are using DHCP and that
Chris static configuration is on the same LAN (reasonable since he can
communicate with local computers), he should be able to connect through
the router. What would stop that?
If you forgot to enter the default gateway IP address or the DNS IP
address(es), that would break your connection. Check those.
Comcast is a cable provider. All cable systems that I know use standard
Ethernet encapsulations with a MTU (max transmission unit) of the
standard default 1500 bytes. Most DSL providers use a PPP encapsulation
with a smaller MTU. If your MTU is too large, your connection usually
doesn't work, except for pings. Can you ping your DNS IP addresses? If
so, there might be an MTU problem, but that is a long shot, since I
assume that comcast is NOT using PPP encapsulation. I think it is likely
that your static config is incomplete, but try pinging the DNS IP
addresses and the default gateway IP address.
-- Kent W. England, Microsoft MVP for Windows Security
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