[lug] Comcast DHCP

[D. Stimits]

> Hi, we moved from Boulder to Lafayette and now the Comcast
> service sort of works, but it seems to have trouble with DHCP.
> 
> I've tried two setups.  Both are all ethernet, no wifi.
> 
> A.
> comcast modem -- Ubuntu laptop
> Works in Boulder and Lafayette.
> Laptop ip address is 73.243.111.222
> 
> B.
> comcast modem -- TPLink router -- Ubuntu laptop
> Works in Boulder, fails in Lafayette.
> Laptop ip address is 192.168.1.100.
> Logging into the TPLink router, I find ...
>     LAN:
>       IP Address:	192.168.1.1
>       Subnet Mask:	255.255.255.0
>     WAN:
>       IP Address:	0.0.0.0	 Dynamic IP
>       Obtaining network parameters...
>       Subnet Mask:	0.0.0.0
>       Default Gateway:	0.0.0.0
>       DNS Server:	0.0.0.0 , 0.0.0.0
> 
> Although setup B worked in Boulder, it doesn't in Lafayette.
> I'm guessing the TPLink router never gets a DHCP address from the modem.
> 
> I've tried two different TPLink routers with the same results,
> and have tested all the ethernet cables.
> 
> Any thoughts?

Sometimes Comcast will bind a router's serial to the physical wire (the house address) and won't allow it to work until their offices mark the device as able to use that address. I would call them and ask if that router can be marked to work with that new location. This includes not just the router in what they might need to "allow", it might also change what DHCP is allowed.

> 
> Thanks,
> Steve
> 
> -- 
> 
> ========================================
> Steve Sullivan      steve.sullivan at mathcom.com
> 720-587-7498        http://www.mathcom.com
> ========================================
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