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Forum Discussion
Not receiving an IP when the orbi is in AP mode
Hi,
I've a SXR80 + 2 SXS80(so, orbi pro wifi 6).
They are set in a AP mode, since I've no choice but to use my provider router(which is the modem for the optic fiber). My AP is configured with the IP 192.168.0.2, the provider router is 192.168.0.1. It's the provider router that provides DHCP for the whole network.
I recently got an issue where new devices on my don't receive an IP(they end up by having an IP in 169.254.x.x).
- If I'm connected directly to my modem(by wire or by the provider router wifi), I've no issues having an appropriate IP
- If I set a manual IP on the device connected to the SXR80's wifi, I can access anything
- I got the same issue on 2 differents latops(and at some point also on some phone)
- if I do an "ipconfig /renew", I get a "Unable to contact your dhcp server. Request has time out"
Any idea what is going on? Any lead on what I could do?
I did reset the whole system, paired again the satellites and everything, same error. But everything has been working nicely the past 6 months.
I'm not totally sure how a device on a network should know which router it should ask an IP? I guess it does broadcast something, hoping that a DHCP server responds, is there something to enable to allow the broadcast to the provider router?
I just updated to the V4.3.2.100 firmware to be sure I was up to date.
Is there something
8 Replies
Jaytonic wrote:
I'm not totally sure how a device on a network should know which router it should ask an IP? I guess it does broadcast something, hoping that a DHCP server responds, is there something to enable to allow the broadcast to the provider router?
Yes, DHCP works by the device sending out a broadcast packet.
https://en.wikipedia.org/wiki/Dynamic_Host_Configuration_Protocol
This broadcast should go everywhere:
- To every port on the SXR80 router, including its WAN port
- To every port on the two SXS80 satellites
- To the primary WiFi network.
Thus, the DHCP request should go to the provider router, and it should respond with an IP assignment.
It appears the provider router has created the 192.168.0.x IP subnet, so devices should get IPs in that subnet.
Since the SRX80 is assigned 192.168.0.2, this process appears to be working correctly.
(As a side note, what IPs are assigned to the two satellites?)
It would be helpful to know if the provider router has a log function that records when IPs are assigned to devices.
(Perhaps it has a feature like the Orbi Attached Devices display that shows which devices are currently connected to the network?)
It is not obvious (to me) that ipconfig /renew will work correctly if the device did not receive an IP address through the normal DHCP process.
I am totally at a loss to explain this weird situation. (Being a total geek) I would use a Wireshark capture to record the DHCP process and "see what is going on." Some time ago, I had a Windows 10 laptop that would fail to connect when I opened the cover (to "wake it up"). Turned out that the Orbi router was responding to DHCP requests, but the laptop was not recognizing them. After some time, a software update on the laptop fixed the problem.
So... what happens on the laptops if you disable and re-enable the network adapters?
Hi,
Thank you for the answer.
I totally agree that the provider router should be the one providing DHCP, I just don't understand why it answers when asked directly, but not through the AP+satellites.
My two satellites have the following IP: 192.168.0.213 and 192.168.0.228.
I did use ipconfig /renew because it was the fastest things I could do to simulate a disable/enable of the network adapter.
I just tried to also disable/enable the network adapter, but I didn't get much more luck.Unfortunately, the provider router is quite poor(well, my internet provider seems to have some kind of custom firmware on it), and it doesn't display logs.
Do you know if there is a tool to simulate a DHCP request? Maybe that would provide me with more info?I was probably confused. If the computer has been set up with a static IP (so that "it works") then ipconfig /renew is not going to accomplish anything.
The only tool I know of is a Wireshark capture on the network adapter that is being used. (I have just become aware that 'modern' laptops no longer include an Ethernet port.)
What I would expect to see is the DHCP request and then.........???
I always like to know how the system is setup.
You have the SXR in AP mode.
Are the satellites hardwired in?
Or wireless?
Do you have it going
gateway's lan port------->SXR wan port-------->sxr lan ports------>devices/satellites?
If its wired, how do you have it wired?
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