Get superfast AT&T Fiber internet
jwl85's profile

Tutor

 • 

4 Messages

Thu, Feb 9, 2017 7:56 PM

Gateway dropping IP Addresses after upgrade GigaPower

My service was upgraded to GigaPower last week (1000 mbps), however the tech did not replace my Residential Gateway.  He was able to use the existing one.  I am now having issues where some devices will drop their IP addresses and obtain some obscure address such as 169.254.171.199 or 169.254.248.189.  The only way to remove this address is to either disconnect the cable or turn WiFi off and back on.  Can anyone give me advice on what I should do to get this resolved? I don't think this was happening before I changed to Fiber.

ApexRon

Professor

 • 

2.2K Messages

Il y a 6 y

ATTDSLCare

Community Support

 • 

1.3K Messages

Il y a 5 y

Hello @jwl85,

Can I suggest trying a hard reset on your modem? I just pulled your modem logs and its full of node up/down messages. So it seems like the dhcp server is failing or there is some kind of IP conflict. 

 

**edit**

adding this because one of my tools just came up, but it shows there is Multiple IP on the same ethernet port. So it sounds like you may have another router connected to your modem with the same DHCP subnet.

Tutor

 • 

4 Messages

Il y a 5 y

I do have some Unifi Access Points on the system but fairly positive they have DHCP turned off. I will double check on that and let you know.  Appreciate the information.

Tutor

 • 

4 Messages

Il y a 5 y

Have triple checked and there is no DHCP being broadcast from my Access Points.  No other Just checked logs and lots of nodes up and down.  I did a factory reset about 48 hours ago.  I'm thinking the next step is to replace the RG.  @ATTDSLCare

ATTDSLCare

Community Support

 • 

1.3K Messages

Il y a 5 y

@jwl85

before we jump into a replacement, could I have you try a few things first? Since the up/downs were pretty much constant, could you disable one access point at a time while monitoring the log to see if the up/downs stop? For example, turn one off then check the log at 20-30 minutes to see if the up/down stopped. Then while leaving that one off go to the next one and repeat the procedure until they are all off.

Then if you have any switches/hubs try them next... 

I want you to try this because I had a similar problem at home, different modem, router, and access point.. but i fought it for a while and it ended up being something to do with my access point.

Tutor

 • 

4 Messages

Il y a 5 y

Did that and still getting ups and downs on wireless devices.  Is part of the sleeping and waking of mobile and wireless devices releasing then re-obtaining IP's?  But when they wake, they are getting self-assigned IP's, not DHCP addresses. I have to turn wifi off and back on to get a good address. @ATTDSLCare

ATTDSLCare

Community Support

 • 

1.3K Messages

Il y a 5 y

@jwl85 Generally there is a 24hour lease on a DHCP IP (this can be changed per the user needs), so when a device sleeps the router will reserve the IP until that lease is up. So when the device wakes up it will grab that same IP (assuming its within that 24 hour lease period). So it doesnt actually release and re-obtain, it just does a quick handshake to make sure everything is cool, if not then it will release/renew.

And I assume that when you are talking about self assigned IP's you are talking about 169.x addressing? is this with the devices trying to get an IP from the modem or from a 3rd party access point?

Need help?
New to AT&T Community?
New to the AT&T Community? Start by visiting the Community How-To.
New to the AT&T Community?
Visit the Community How-To.