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Asus router ISP DHCP does not function properly
HI - read this forum and believe I'm having the same issue: https://forums.xfinity.com/t5/Your-Home-Network/Your-ISP-s-DHCP-is-not-functioning-properly-ASUS-router/td-p/3331178 @ComcastChe are you able to assist? I think the same response would help greatly. Thank you
aggielaw
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4 years ago
I just solved this after five hours frustration and nearly two hours on the phone with two Xfinity reps. The cause of my outage was a breaker trip that shut down my modem and router.
The provisioning signal did not solve my issue. Searching the internet with slightly different search terms I came across a thread that speculated Comcast has a "banned MAC address" list, and the user stated that cloning the MAC address of the "first" computer connected to the router solved his problem. It solved my problem immediately.
MAC cloning is done in your router GUI; in my RT-1900AC it is under "WAN -> Internet Connection -> Special Requirement From ISP." There's a button that says "MAC clone;" hit it and it does the work for you.
One interesting note about this is I was able to connect my modem to a single computer without issue. It seems like a duplicate MAC issue would cause the network to reject the reconnection rather than rejecting the router. However, the MAC/network issue clearly lay with the router given the modem would send internet through to a computer when directly connected.
I hope this helps you and many others in the future. After owning several Linksys and Netgear routers I've been very happy with my ASUS, and I'd hate for people to steer clear of these reliable products over an xfinity anomaly.
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