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JimVR4
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Regular Visitor

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8 Messages

Monday, January 2nd, 2023 5:18 PM

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Internet dropouts - DHCP Server Issues?

I'm having connection reliability issues. I've traced it to the DHCP lease constantly being dropped. New leases are granted for 3 day periods but seldom last more than a few hours. I've done all the usual things including restarting my MB8611 modem but the issue persists. My router reports that my ISP DHCP server does not function properly.

Question

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Updated 

2 years ago

 • Edited

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CCDaryl

Problem Solver

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828 Messages

2 years ago

Just to confirm, you are asking why another user is catching and releasing their Ip address every few hours?

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JimVR4

Regular Visitor

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8 Messages

2 years ago

I'm asking why Xfinity DHCP server is constantly dropping and renewing my lease.  It's happened again in the 20 minutes since I started this thread

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CCDaryl

Problem Solver

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828 Messages

2 years ago

Thank you for clarifying that. Are you leasing your modem from Xfinity, or do you use your own Comcast approved modem and router?

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JimVR4

Regular Visitor

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8 Messages

@XfinityDaryl​ I own my MB8611

(edited)

2 years ago

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XfinityThomasD

Official Employee

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1.2K Messages

Not sure why it would be releasing it so frequently, but we can look further into the signal coming to your home and see if there is any distortion that is causing some interference. Would you please send our team a direct message with your full name and full address?

 

To send a Direct Message:

 

Ensure you are logged in

  • Click the "Direct Messaging" icon or https://forums.xfinity.com/direct-messaging
  • Click the "New message" (pencil and paper) icon
  • The "To:" line prompts you to "Type the name of a person". Instead, type "Xfinity Support" there.
    • As you are typing a drop-down list appears. Select "Xfinity Support" from that list.
    • An "Xfinity Support" graphic replaces the "To:" line.
  • Type your message in the text area near the bottom of the window
  • Press Enter to send it.
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2 years ago

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JimVR4

Regular Visitor

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8 Messages

2 years ago

Anyone else experiencing these lease dropouts?

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zip21222

Contributor

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160 Messages

2 years ago

@JimVR4 

There have been somewhat similar DHCP issues reported with Asus routers.

Are you running an Asus router?

If I recall correctly, many of the problems came down to the WAN / DHCP query frequency setting.

If you have an Asus router, I'd try experimenting with that setting.

HTH

(edited)

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JimVR4

Regular Visitor

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8 Messages

@zip21222​ Thanks for your reply.  I do have an Asus router and the WAN / DHCP query frequency is set "Aggressive"
I don't expect this is the issue however and Xfinity says they see lower signal levels than expected.
I'm expecting a service technician sometime this afternoon

(edited)

2 years ago

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JimVR4

Regular Visitor

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8 Messages

2 years ago

To add more to this, the technician came to my house and found the downstream and upstream signal levels were too strong through the CM-3418 8 port signal amp that I have.

The solution was to remove that 8 way and install a passive 4 way.  His equipment reported +4dBmV downstream and about 48dBmV upstream after the fix.

What's odd is that this issue has only been occuring since the modem was upgraded from SB6183 to MB8611.

This worked fine for a few minutes but after the technician left the problem recurred.

So I think the signal levels were not the issue causing DHCP problems.

(edited)

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user_Es0824

Contributor

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70 Messages

@JimVR4​ Can you post your modem logs? Specifically, the error logs, modem software and upstream and downstream levels?

2 years ago

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JimVR4

Regular Visitor

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8 Messages

These details are not available to me nor are they relevent to the issue.  A technician was on-site and verified everything and the problem recurred almost immediately

2 years ago

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