Deco X60 fails to get IP from Comcast/Xfinity Docsis motorola 24x8 MB7621

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Deco X60 fails to get IP from Comcast/Xfinity Docsis motorola 24x8 MB7621

This thread has been locked for further replies. You can start a new thread to share your ideas or ask questions.
Deco X60 fails to get IP from Comcast/Xfinity Docsis motorola 24x8 MB7621
Deco X60 fails to get IP from Comcast/Xfinity Docsis motorola 24x8 MB7621
2023-04-07 15:16:10 - last edited 2023-04-07 15:19:59
Model: Deco X60  
Hardware Version:
Firmware Version: 1.5.1 Build 20210204

Older issue with alternative workaround.

 

Similar issue in-
https://community.tp-link.com/us/home/forum/topic/521262

https://community.tp-link.com/us/home/forum/topic/150603 

 

Likely cause was/is MAC Binding.  "Essentially what is happening is the Modem is still bound to the MAC (media access control) address from the last device that was connected to it."

 

I switched from Fidium/Fiber are the end of a 12 month intro rate of 35$/month for 50Mb/s $55/month.

Comcast/Xfinity was running a 200Mb/s for $25/month  for 24 months promo - probably to compete with Fidium.

I don't 'like'  Comcast, but one has to  move for $30/month and a lot more speed.

 

I re-used my (Bestbuy) modem: Docsis motorola 24x8 MB7621 s/n 2110-MB7621-30-5243 

The DECO X60 acted up, couldn't get an WAN IP from this simple-no-router-modem in Deco Dynamic IP setting as 'detected'.

 

A laptop connected earlier to test the modem worked fine, got an IP as it should, but the DECO wouldn't. 

In desparation I tried both ports; tossed a GB switch between Deco and Modem; switched on  'Unicast' whatever that does; but no joy.

FInding the topics above after the fact I suspect I simply should have waited longer before trying over and over.

 

Any, my workaound was to  switch the Deco to Static IP and cloned all the laptop settings into it.

- Preferred IP, Gateway, DNS and most importantly the MAC address (CMD> ipconfig /all).

Reboot Deco and bingo! Comcast recognized the MAC, gave it its preferred IP back and GREEN to go.

 

Hope this helps someone in a similar predicament,

Cheers,

Hein

 

 

 

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Re:Deco X60 fails to get IP from Comcast/Xfinity Docsis motorola 24x8 MB7621
2023-04-11 13:38:34
UPDATE: Well, that didn't last long. The Static IP no longer worked after 24 hr. It was good for troubleshooting, but the real solution is to either wait for the modem cache to flush or reset the modem. I used reset and after that the Dynamic IP started to work as expected. Hein.
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