Very brief network outages

[triumph100]

My router is posting the below pair of entries in the WAN DHCP Log on the hour's 13th and 17th minutes, every hour 24x7.  I receive a very brief network outage during the first entry (on the 13th minute) for about 5 seconds.

Time | Event type | Log Level | Details

2022 Apr 25 22:17:38

dhclient

info

[WDHCP] RCV: Reply message on eth4 from XXXX::XXXX:XXXX:XXXX:XXXX.

2022 Apr 25 22:13:35

dhcpc.sh

info

[WAN.6][WDHCP] renew IP: XX.XX.XX.XX

Any thoughts?

Also, where does the "PON Card" you indicated sit?  Is that within the ONT, or? 

Thank you!!

[Cang_Household]

Unless your WAN DHCP log shows IP rebind warnings and arp failures, it is not likely an upstream issue.

PON card is sitting in the Central Office/Neighborhood distribution hub. More specifically, in the Optical Line Terminal, the other end of the fiber reaching your ONT.

It could be a clock synchronization issue, that the Gateway Router (GWR) recycles your WAN IP before your router times out to renew the IP address.

[triumph100]

This post was originally in response to this solved one: 

"HELP - Daily WAN disconnects" 

https://forums.verizon.com/t5/fios-internet/help-daily-wan-disconnects/m-p/912409#M85885

I believe it may be very similar!

[Cang_Household]

That's not similar.

Like I said before, unless your WAN DHCP log shows IP rebind warning or arp failures, it is not likely a upstream issue.

[triumph100]

Thanks for the replies.  I checked the WAN DHCP Log and no indication of IP rebind warning or arp failures.

Now that I've been investigating this a little more in depth, the drop outs are much more frequent and random throughout the day.  The internet drops out for only about 5 seconds each time.  I've checked that our Verizon TV and Land-line Phone (there's a dial tone) are both running seemingly fine during a drop out.

I'm not seeing any other useful information in any of the logs on the Fios Router.

Not sure what else to check and of course open to any ideas.

[triumph100]

Here is a sample of the outage frequency and duration.  I ran this log overnight.

[Cang_Household]

I believe this may be a LAN DHCP issue. Could you turn off G3100's DHCP server and run another separate DHCP server in your network?

[triumph100]

I believe that is a little over my head.  Do you have any articles that could help?  Wasn't able to find anything on the web.

[dslr595148]

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@triumph100 wrote:

I believe that is a little over my head.  Do you have any articles that could help?  Wasn't able to find anything on the web.

Not known what you need help with.

If you need to turn off the DHCP Server, that will depend on the brand and model of the NAT router. If your NAT router is the G110 (OR your NAT router has the same UI that the G100 has.  See as need be REF https://forums.verizon.com/t5/g1100-bridging-guide/bd-p/g1100-bridging-guide to show what the UI looks llke) then...

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#1 After logging into it click on "My Network" tab in the main navigation bar. 

#2 Click "Network Connections" tab in the left submenu.

#3 Click "Network (Home/Office)" hyperlink in the Network Connections section.

#4 Click "Settings" at the bottom of Network (Home/Office) Properties.

#5 There is need to change the LAN IP of the NAT router, as directed in the G1100 Bridging Guide.

#6 Under IP Address Distribution section, change the dropdown "IP Address Distribution" to "Disabled." 

#7 Save/Apply the setting.

On the other hand If your NAT router is not the G1100 (or simular UI), then it would help to post at least the brand and model of your NAT router.

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If you need help setting up a DHCP Server, it would help to know...

#1 What the OS and Version that your computer uses. As depending on the OS there might be one there but this feature is disabled.

#2 If you have any other NAT routers besides the G1100 (or other NAT router with a simular UI.)

Anyways moving along...

#1 The reason why the DHCP Server in the NAT must be disabled is because you can have only DHCP Server enabled at a time, otherwise conflicts will happen.

#2 I used Google to lookup dhcp server freeware

I found different results back.

https://sourceforge.net/projects/dhcpserver/

https://www.snapfiles.com/get/serva.html Note includes a DHCP Server but not just a DHCP Server.

https://www.hanewin.net/dhcp-e.htm

https://www.dhcpserver.de/cms/

[EDIT] I also found this https://en.wikipedia.org/wiki/Comparison_of_DHCP_server_software

[triumph100]

My Router is the Verizon G3100