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burgess85
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Joined: 22 Sep 2012
Posts: 78
PostPosted: Fri Nov 26, 2021 19:58    Post subject: Help Reply with quote
I am hoping someone can assist. Using 47665 with a VPN connected. The ddwrt router is connected via ethernet cable to a LAN port on my main router. Today I had an issue where one of the devices connected to a LAN port on the ddwrt router managed to pick up a LAN IP from my main router. How can I stop this from happening?
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burgess85
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Joined: 22 Sep 2012
Posts: 78
PostPosted: Sat Nov 27, 2021 14:05    Post subject: Reply with quote
Can anyone advise please?
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Per Yngve Berg
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Joined: 13 Aug 2013
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Location: Romerike, Norway
PostPosted: Sat Nov 27, 2021 14:10    Post subject: Reply with quote
The main router must be connected to the WAN port of the dd-wrt router.

Or you have assigned WAN port to LAN.
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burgess85
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Joined: 22 Sep 2012
Posts: 78
PostPosted: Sat Nov 27, 2021 14:34    Post subject: Reply with quote
DDWRT router Wan is port is connected to Lan port on main router
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egc
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Joined: 18 Mar 2014
Posts: 12889
Location: Netherlands
PostPosted: Sat Nov 27, 2021 14:47    Post subject: Reply with quote
You had an "issue", what actually happened did the router rebooted and during reboot the client acquired a IP address from the primary router?

What router do you have?
_________________
Routers:Netgear R7000, R6400v1, R6400v2, EA6900 (XvortexCFE), E2000, E1200v1, WRT54GS v1.
Install guide R6400v2, R6700v3,XR300:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=316399
Install guide R7800/XR500: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=320614
Forum Guide Lines (important read):https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324087
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burgess85
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Joined: 22 Sep 2012
Posts: 78
PostPosted: Sat Nov 27, 2021 14:56    Post subject: Reply with quote
egc wrote:
You had an "issue", what actually happened did the router rebooted and during reboot the client acquired a IP address from the primary router?

What router do you have?


Really not sure just noticed a device had picked up a IP address from my Google router and not the R7800 Netgear ddwrt router.
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burgess85
DD-WRT User


Joined: 22 Sep 2012
Posts: 78
PostPosted: Sat Nov 27, 2021 17:43    Post subject: Reply with quote
How can I stop the ddwrt router giving clients on the ddwrt router and IP from my main router?
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egc
DD-WRT Guru


Joined: 18 Mar 2014
Posts: 12889
Location: Netherlands
PostPosted: Sat Nov 27, 2021 18:59    Post subject: Reply with quote
Difficult to say as you are not sharing much information about the routers and setup
_________________
Routers:Netgear R7000, R6400v1, R6400v2, EA6900 (XvortexCFE), E2000, E1200v1, WRT54GS v1.
Install guide R6400v2, R6700v3,XR300:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=316399
Install guide R7800/XR500: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=320614
Forum Guide Lines (important read):https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324087
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burgess85
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Joined: 22 Sep 2012
Posts: 78
PostPosted: Sat Nov 27, 2021 19:11    Post subject: Reply with quote
egc wrote:
Difficult to say as you are not sharing much information about the routers and setup


Google router Lan cable to r7800 wan cable. Ddwrt set to DHCP
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burgess85
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Joined: 22 Sep 2012
Posts: 78
PostPosted: Sat Nov 27, 2021 19:15    Post subject: Reply with quote
Setup attached
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burgess85
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Joined: 22 Sep 2012
Posts: 78
PostPosted: Sat Nov 27, 2021 20:32    Post subject: Reply with quote
Also the ddwrt router is in gateway mode
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egc
DD-WRT Guru


Joined: 18 Mar 2014
Posts: 12889
Location: Netherlands
PostPosted: Sun Nov 28, 2021 7:37    Post subject: Reply with quote
Other then the time setting everything looks good.

Server IP/Name can best be left blank as stated in the help text.

But this is not related to the problem you mentioned.

The router is up for 15 hours 14 minute, did it happen at that time?
_________________
Routers:Netgear R7000, R6400v1, R6400v2, EA6900 (XvortexCFE), E2000, E1200v1, WRT54GS v1.
Install guide R6400v2, R6700v3,XR300:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=316399
Install guide R7800/XR500: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=320614
Forum Guide Lines (important read):https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324087
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burgess85
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Joined: 22 Sep 2012
Posts: 78
PostPosted: Sun Nov 28, 2021 9:38    Post subject: Reply with quote
egc wrote:
Other then the time setting everything looks good.

Server IP/Name can best be left blank as stated in the help text.

But this is not related to the problem you mentioned.

The router is up for 15 hours 14 minute, did it happen at that time?


Happened before that had to reboot the ddwrt router but worried it will happen again
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egc
DD-WRT Guru


Joined: 18 Mar 2014
Posts: 12889
Location: Netherlands
PostPosted: Sun Nov 28, 2021 9:41    Post subject: Reply with quote
Does the client has Wireless enabled so that it could connect wirelessly to the primary router?

If so disable wireless

I can not come up with another explanation.
_________________
Routers:Netgear R7000, R6400v1, R6400v2, EA6900 (XvortexCFE), E2000, E1200v1, WRT54GS v1.
Install guide R6400v2, R6700v3,XR300:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=316399
Install guide R7800/XR500: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=320614
Forum Guide Lines (important read):https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324087
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burgess85
DD-WRT User


Joined: 22 Sep 2012
Posts: 78
PostPosted: Sun Nov 28, 2021 9:45    Post subject: Reply with quote
egc wrote:
Does the client has Wireless enabled so that it could connect wirelessly to the primary router?

If so disable wireless

I can not come up with another explanation.

This is what is confusing. No WiFi at all on the client that had the issue but it 100% picked up a 192.168.86 IP address
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