Originally Posted by mogul420
checked. firewall is off.
weirder, the Chromecast app detects it, but my browser doesnt.
I'm on the same boat with a "similar" problem. I have a Netgear N900 dual band router, but the issue persists while my main laptop (Win7) is connected via WiFi to either band (2.4GHz or 5.0GHz) or if I connect it directly to the router via Ethernet wire. Using the Chromecast app from the same laptop works without a hitch. I can also ping the Chromecast IP address without a problem. I have rebooted several times, uninstalled and re-installed Chrome and the Google Cast extension, but it makes no difference. I believe that the plugin is conflicting with "something" in this specific laptop. The issue is not with the LAN. All devices are on the same Network segment and respond to pings. The Google Cast extension works fine from two other laptops running Win7 with a similar setup, running the same version of the Chrome browser and Google Cast. I can also cast from my Android mobile devices (Nexus 7 & SGS3) using youtube. Suggestions anyone?
The conflict was being caused by an active "virtual" network adapter. Specifically, the Leaf Network adapter that was installed with Netgear's ReadyShare Cloud. I guess this adapter works as a VPN to connect to the ReadyShare Cloud. I disabled this adapter and the Chromecast discovery worked. Apparently, the Chrome Cast extension is not smart enough to avoid virtual (VPN) adapters and link with the Primary (physical) wired/wireless adapter. At minimum, the extension should have an option to select the adapter to use. I don't user ReadyShare that frequently so having the adapter disabled does not bother me much.