Archer AX50 AX3000
This thread has been locked for further replies. You can start a new thread to share your ideas or ask questions.Archer AX50 AX3000
This thread has been locked for further replies. You can start a new thread to share your ideas or ask questions.
Hi
When I have the AX50 router in AP-mode it doen't seam to respect the DHCP options from the firewall that runs the DHCP-server for my LAN.
I can see that the Archer AX50 is renewing the lease about every 30 seconds. This doesn't look right.
I have these options set on the DHCP-server:
option dhcp-lease-time 3600;
option dhcp-renewal-time 1655;
option dhcp-rebinding-time 3005;
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I am seeing the same thiing with an Archer AX1500 in Access Point mode. I just discovered it yesterday and have not had a chance to troubleshoot. The WAN port of the AX1500 renews the lease about every 30 seconds. My DHCP server isc-dhcp-server and is set to a 6 hour lease. All the other devices on the network honor that lease and renew at 3 hours (50% of lease time). I will post more if I figure anything out.
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Yes, I have the latest firmware.
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@MartinBer Is your device still renewing every 30 seconds?
I changed my TP-Link to a fixed IP address while I troubleshoot another problem. I noticed the DHCP issue because my TP-Link would randomly reboot every couple days. Since I changed to a fixed IP address on the AX1500 it has not rebooted. I have to wait a couple weeks to make sure that the issue is fixed. If it does fix it, I will contact TP-Link about the fast DHCP renewal because it might be related to the rebooting.
Reference: https://community.tp-link.com/en/business/forum/topic/199292
update: 2020-05-05 DHCP issue does not fix the rebooting.
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After many emails about this AX1500 issue with TP-Link support they stated the DHCP operation is a "built-in mechanism which is not a bug to be fixed". They call it "Smart DHCP". It is the "mechanism that will keep checking if there's another DHCP server here in the period of 30s.The Smart DHCP is to help determine if the router should open AX1500's own DHCP server or not."
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I'm seeing this also, on an AX1500 with the latest firmware, 1.2.5 Build 20220117 Rel. 51845(4555).
I have the AX1500 DHCP server set to "off" (not "auto"), so I don't think it's a legit reason to renew the DHCP lease every 30 seconds to check if it needs to turn the DHCP server on. Since it's disabled and should never start. I suppose there is some value in knowing the DHCP server is functional for clients connected to the AP. Perhaps the orange light would come on if it was down.
Still, it's flooding the router log with DHCP renewals.
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david3 wrote
I'm seeing this also, on an AX1500 with the latest firmware, 1.2.5 Build 20220117 Rel. 51845(4555).
I have the AX1500 DHCP server set to "off" (not "auto"), so I don't think it's a legit reason to renew the DHCP lease every 30 seconds to check if it needs to turn the DHCP server on. Since it's disabled and should never start. I suppose there is some value in knowing the DHCP server is functional for clients connected to the AP. Perhaps the orange light would come on if it was down.
Still, it's flooding the router log with DHCP renewals.
Hello @david3, do you mean the AX1500 still sends the DHCP request to the front-end gateway router even after you disabled the DHCP Server on the AX1500? Can I know the detailed network layout and how are the gateway router and the AX1500 connected? Generally, if the DHCP Server has been set to off, it won't send the request to the gateway to check if it needs to be on.
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@Kevin_Z Yes, the DHCP server on the AX1500 is set to "Off" and it still sends DHCP requests to the router every 30 seconds. The AX1500 is set to "Access Point Mode" and the LAN setting on the AX1500 is set to "Dynamic IP." The AX1500 has a cat-6 cable connected to the WAN port going to a gigabit switch that the Mikrotik router is also connected to. The Mikrotik has a DHCP server.
So I would expect the AX1500 to get it's IP from the router, just not every 30 seconds, since the DHCP lease time on the router is 24 hours.
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david3 wrote
@Kevin_Z Yes, the DHCP server on the AX1500 is set to "Off" and it still sends DHCP requests to the router every 30 seconds. The AX1500 is set to "Access Point Mode" and the LAN setting on the AX1500 is set to "Dynamic IP." The AX1500 has a cat-6 cable connected to the WAN port going to a gigabit switch that the Mikrotik router is also connected to. The Mikrotik has a DHCP server.
So I would expect the AX1500 to get it's IP from the router, just not every 30 seconds, since the DHCP lease time on the router is 24 hours.
@david3 Try changing the AX1500 to Static IP, then confirm if the DHCP requests stop.
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