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Standard User TheBaron
(knowledge is power) Thu 28-Jan-21 19:41:36
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TP LINK VR2800 issuing odd IP address


[link to this post]
 
Hi,

I have a TP link VR2800 Wifi modem/router in the loft connected to Plusnet FTTC.

Plusnet connection is rock solid.

Network is simple using DHCP with the Gateway IP set as 192.168.1.1, I use 8.8.8.8 as the DNS server.

I have some wired devices on a LAN, I also have some TP link (Wifi ) Powerline devices to extend the range of Wifi, I have made all the SSID the same as the router.

Pretty straight forward, however some phones/laptops in the house lose connection to the internet (not the router).

When I look, they have another IP address for the gateway/DNS server ie 192.168.1.118 (this may change at random) , which is another IP address in the DHCP range. (100 to 199). And its not always that IP but a random one in the range.

Where is this coming from ? Any ideas ?

Thanks in advance

I like pigs.
Dogs look up to us. Cats look down on us. Pigs treat us as equals.
Sir Winston Churchill
Standard User GonePostal
(committed) Thu 28-Jan-21 20:31:17
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Re: TP LINK VR2800 issuing odd IP address


[re: TheBaron] [link to this post]
 
In reply to a post by TheBaron:
Hi,

I have a TP link VR2800 Wifi modem/router in the loft connected to Plusnet FTTC.

Plusnet connection is rock solid.

Network is simple using DHCP with the Gateway IP set as 192.168.1.1, I use 8.8.8.8 as the DNS server.

I have some wired devices on a LAN, I also have some TP link (Wifi ) Powerline devices to extend the range of Wifi, I have made all the SSID the same as the router.

Pretty straight forward, however some phones/laptops in the house lose connection to the internet (not the router).

When I look, they have another IP address for the gateway/DNS server ie 192.168.1.118 (this may change at random) , which is another IP address in the DHCP range. (100 to 199). And its not always that IP but a random one in the range.

Where is this coming from ? Any ideas ?

Thanks in advance


The IP of the Powerline device to which they are connected?
Standard User jchamier
(eat-sleep-adslguide) Thu 28-Jan-21 20:51:28
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Re: TP LINK VR2800 issuing odd IP address


[re: TheBaron] [link to this post]
 
In reply to a post by TheBaron:
Where is this coming from ? Any ideas ?
Sounds as if you have another device running DHCP server. Perhaps one of the power line devices. Check their settings for DHCP and turn it off. Only the VR2800 should have DHCP enabled.

21 years of broadband connectivity since 1999 trial - Live BQM


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Standard User prlzx
(experienced) Thu 28-Jan-21 22:05:44
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Re: TP LINK VR2800 issuing odd IP address


[re: TheBaron] [link to this post]
 
Is your powerline networking encrypted (I don't mean just the Wi-Fi part)?
Otherwise there is a non-zero chance that neighbours can be connected if also happen to be using powerline.

The suggestion of a rogue DHCP server in your network is the most likely but these are not mutually exclusive possibilities.



prlzx on Zen: FTTC (VDSL) at ~40Mbps / 10Mbps
with IP4/6 (no v6? - not true Internet)
Standard User TheBaron
(knowledge is power) Fri 29-Jan-21 00:02:04
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Re: TP LINK VR2800 issuing odd IP address


[re: jchamier] [link to this post]
 
Thanks. A bit of googling TP link powerline and DHCP and I hit this thread

TP Link Powerline DHCP problems

So there is a 'hidden' DHCP server in these plugs, I'll try the firmware update. Not really noticed these problems until we had 5 of us working from home !

I'm thinking now of adding an access point EAP 265HD instead.

Or is that overkill ? Around 10 Wifi devices floating around the house.


Thanks All

I like pigs.
Dogs look up to us. Cats look down on us. Pigs treat us as equals.
Sir Winston Churchill
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