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Using Linksys router to add wireless to cable network

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steveavis

Wow! thanks for the quick replys!

The modem's quite happy to play with the switch, or with an individual computer plugged into it (as I'm doing now).

Half a decade ago, I worked for Telewest (now part of Virgin) as a contract installer. We needed to phone through the MAC addresses before they'd connect the modems. They changed this just as I was leaving so no MAC addresses were needed.

The modem's IP is 192.168.100.1, with it's DHCP pool running from 192.168.100.11-42, so I assigned the router as 192.168.100.2, the laptop as ...3 & a desktop as ...4 & turned DHCP off on the router.
both computers could see both modem & router, but neither of them could go online...

The subnet mask assigned by the modem is 225.225.248.0 (I think- that's what ipconfig/all tells me...), while the router will only accept values 225.225.225.x (via a drop down menu). Could this be my problem?