Re: Cable modem config page

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From: Phillip Windell (_at_.)
Date: 06/08/04 

Date: Tue, 8 Jun 2004 09:51:42 -0500

"Dave Whyte" <dwhyte@101digitalservices.co.uk> wrote in message
news:OEBVbyOTEHA.3548@TK2MSFTNGP09.phx.gbl...
> The cable modem in question is a Motorola Surfboard 4100. It has a mac
> address and an internal CM config page which if plugged straight into a pc
> with crossover is reached at 192.168.100.1. It also has a public dynamic
> address given by the ISP.
> I know it may look funny i.e. having a local address 2nd nic, to a Nat
> router then to a cable modem who's config page is also a local address,
but
> that is the way of things. The CM does therefore act as a media converter.
> I do understand, and have explained the network topology as it lies.

I checked on Motorola's site. The 4100 is no longer listed but the 4200 is.
I looked at the PDF for setting it up. All I can say is "What a convoluted
mess!!",...I don't have to worry about buying anything from them that is for
sure. It appears to do DHCP and appears to act as a NAT box (soho
router),..but only to a point,..it only has one LAN port and only supports
up to 32 users (you have to use a separate hub or switch). So it appears
after that point you'd have to add an additional NAT box to gain additional
users, thereby creating a (probably unwanted) Back-to-Back DMZ between the
NAT Box and the Motorola that many people running small networks don't
understand or know how to deal with. 

-- 
Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com

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