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Archer C6 DHCP request

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Archer C6 DHCP request

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Archer C6 DHCP request
Archer C6 DHCP request
2021-03-17 17:00:32 - last edited 2023-04-13 06:19:03
Model: Archer C6  
Hardware Version: V2
Firmware Version: 1.3.6

Hi,

 

I'm using an Archer C6 as access point. I configured it to obtain an IP via DHCP.

It works, but it keeps on sending a DPCP request every 32 seconds. This is the log from my router, apu is the router hostname, apletto the archer one:

 

15:12:27 apu dnsmasq-dhcp: DHCPREQUEST(br0) 192.168.85.50
15:12:27 apu dnsmasq-dhcp: DHCPACK(br0) 192.168.85.50 apletto
15:12:59 apu dnsmasq-dhcp: DHCPREQUEST(br0) 192.168.85.50
15:12:59 apu dnsmasq-dhcp: DHCPACK(br0) 192.168.85.50 apletto
15:13:31 apu dnsmasq-dhcp: DHCPREQUEST(br0) 192.168.85.50
15:13:31 apu dnsmasq-dhcp: DHCPACK(br0) 192.168.85.50 apletto
15:14:03 apu dnsmasq-dhcp: DHCPREQUEST(br0) 192.168.85.50
15:14:03 apu dnsmasq-dhcp: DHCPACK(br0) 192.168.85.50 apletto
15:14:36 apu dnsmasq-dhcp: DHCPREQUEST(br0) 192.168.85.50
15:14:36 apu dnsmasq-dhcp: DHCPACK(br0) 192.168.85.50 apletto
15:15:08 apu dnsmasq-dhcp: DHCPREQUEST(br0) 192.168.85.50
15:15:08 apu dnsmasq-dhcp: DHCPACK(br0) 192.168.85.50 apletto
15:15:40 apu dnsmasq-dhcp: DHCPREQUEST(br0) 192.168.85.50
15:15:40 apu dnsmasq-dhcp: DHCPACK(br0) 192.168.85.50 apletto
15:16:12 apu dnsmasq-dhcp: DHCPREQUEST(br0) 192.168.85.50
15:16:12 apu dnsmasq-dhcp: DHCPACK(br0) 192.168.85.50 apletto
15:16:44 apu dnsmasq-dhcp: DHCPREQUEST(br0) 192.168.85.50
15:16:44 apu dnsmasq-dhcp: DHCPACK(br0) 192.168.85.50 apletto
15:17:16 apu dnsmasq-dhcp: DHCPREQUEST(br0) 192.168.85.50
15:17:16 apu dnsmasq-dhcp: DHCPACK(br0) 192.168.85.50 apletto
15:17:49 apu dnsmasq-dhcp: DHCPREQUEST(br0) 192.168.85.50
15:17:49 apu dnsmasq-dhcp: DHCPACK(br0) 192.168.85.50 apletto
15:18:21 apu dnsmasq-dhcp: DHCPREQUEST(br0) 192.168.85.50
15:18:21 apu dnsmasq-dhcp: DHCPACK(br0) 192.168.85.50 apletto
15:18:53 apu dnsmasq-dhcp: DHCPREQUEST(br0) 192.168.85.50
15:18:53 apu dnsmasq-dhcp: DHCPACK(br0) 192.168.85.50 apletto
15:19:25 apu dnsmasq-dhcp: DHCPREQUEST(br0) 192.168.85.50
15:19:25 apu dnsmasq-dhcp: DHCPACK(br0) 192.168.85.50 apletto
15:19:57 apu dnsmasq-dhcp: DHCPREQUEST(br0) 192.168.85.50
15:19:57 apu dnsmasq-dhcp: DHCPACK(br0) 192.168.85.50 apletto

 

It's going like this since an year or so, can't we raise the lease timeout to something reasonable (e.g. 12 hours) or at least make it configurable?

 

Regards,

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#1
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1 Accepted Solution
Re:Archer C6 DHCP request-Solution
2021-03-18 03:34:24 - last edited 2023-04-13 06:19:03

@teknoraver 

 

Hello, as far as I understand, this is normal when the smart DHCP is on the C6 when it is working as an access point. When we enable the Smart DHCP on it, it will continuously check if the DHCP server on the network is correctly on, it will turn itself on if it finds there is no DHCP server in the network.

 

Back to your concern, you can disable the DHCP server on the C6, and choose static IP for the LAN, there won't be an issue then:

Nice to Meet You in Our TP-Link Community. Check Out the Latest Posts: Connect TP-Link Archer BE550 to Germany's DS-Lite (Dual Stack Lite) Internet via WAN Archer GE550 - BE9300 Tri-Band Wi-Fi 7 Gaming Router EasyMesh Is Available When Wi-Fi Routers Work in AP Mode as A Controller. Archer AX55V2 Supports WireGuard VPN, EasyMesh Ethernet Backhaul, IoT Network, Speed Limit,and More If you found a post or response helpful, please click Helpful (arrow pointing upward icon). If you are the author of a topic, remember to mark a helpful reply as the "Recommended Solution" (star icon) so that others can benefit from it.
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#2
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10 Reply
Re:Archer C6 DHCP request-Solution
2021-03-18 03:34:24 - last edited 2023-04-13 06:19:03

@teknoraver 

 

Hello, as far as I understand, this is normal when the smart DHCP is on the C6 when it is working as an access point. When we enable the Smart DHCP on it, it will continuously check if the DHCP server on the network is correctly on, it will turn itself on if it finds there is no DHCP server in the network.

 

Back to your concern, you can disable the DHCP server on the C6, and choose static IP for the LAN, there won't be an issue then:

Nice to Meet You in Our TP-Link Community. Check Out the Latest Posts: Connect TP-Link Archer BE550 to Germany's DS-Lite (Dual Stack Lite) Internet via WAN Archer GE550 - BE9300 Tri-Band Wi-Fi 7 Gaming Router EasyMesh Is Available When Wi-Fi Routers Work in AP Mode as A Controller. Archer AX55V2 Supports WireGuard VPN, EasyMesh Ethernet Backhaul, IoT Network, Speed Limit,and More If you found a post or response helpful, please click Helpful (arrow pointing upward icon). If you are the author of a topic, remember to mark a helpful reply as the "Recommended Solution" (star icon) so that others can benefit from it.
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#2
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Re:Archer C6 DHCP request
2021-03-18 09:44:47 - last edited 2021-03-27 08:33:51

Can you try if just setting the C6 DHCP server from Auto to Off will suffice to stop the exchange of these DHCP messages ?

 

 

But that will result in losing the number of wired and wireless clients on C6 Network Status page (in AP mode):

 

 

I'd be happy to be proved wrong.

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#3
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Re:Archer C6 DHCP request
2021-03-18 12:21:00

@Ivaylo I have the DHCP _server_ turned off because I have another DHCP server in the same network.

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Re:Archer C6 DHCP request
2021-03-18 13:07:44 - last edited 2021-03-18 13:08:27

@teknoraver 

 

OK, when you set Static IP (instead of Smart IP), has the problem been resolved and what about wired and wireless clients' numbers, are they displayed correctly ?

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#5
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Re:Archer C6 DHCP request
2021-03-18 13:48:56
The number of clients it's always 0, but I don't need it, the other dhcp server is providing the same informations. Yes if I set static IP it "fixes" it, but that's just a workaround. Can't we have DHCP with a sane lease time?
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#6
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Re:Archer C6 DHCP request
2021-03-18 15:15:13 - last edited 2021-03-27 06:58:33

@teknoraver 

 

Can you try now to set the Static IP, DHCP server to Auto and observe again if the DHCP messages are there and what's the clients number ?

In Auto the device will sense if there's an additional DHCP server in your LAN (which you have) and will turn it Off automatically (no reboot needed).

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Re:Archer C6 DHCP request
2021-03-18 15:43:41

@Ivaylo tried, it still doesn't solve the continuous requests issue:

 

16:41:16.423194 IP 192.168.85.50.68 > 192.168.85.1.67: BOOTP/DHCP, Request from 60:32:b1:0d:e9:2f, length 370
16:41:16.453339 IP 192.168.85.1.67 > 192.168.85.50.68: BOOTP/DHCP, Reply, length 317
16:41:48.596217 IP 192.168.85.50.68 > 192.168.85.1.67: BOOTP/DHCP, Request from 60:32:b1:0d:e9:2f, length 370
16:41:48.607358 IP 192.168.85.1.67 > 192.168.85.50.68: BOOTP/DHCP, Reply, length 317
16:42:20.762165 IP 192.168.85.50.68 > 192.168.85.1.67: BOOTP/DHCP, Request from 60:32:b1:0d:e9:2f, length 370
16:42:20.781950 IP 192.168.85.1.67 > 192.168.85.50.68: BOOTP/DHCP, Reply, length 317
16:42:52.921649 IP 192.168.85.50.68 > 192.168.85.1.67: BOOTP/DHCP, Request from 60:32:b1:0d:e9:2f, length 370
16:42:52.926244 IP 192.168.85.1.67 > 192.168.85.50.68: BOOTP/DHCP, Reply, length 317
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#8
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Re:Archer C6 DHCP request
2021-03-18 15:59:16

@teknoraver 

 

Switch it to the AP mode.

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#9
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Re:Archer C6 DHCP request
2021-03-18 16:18:40

@Ivaylo I don't care about the cliet number. I don't neet it, it can also be wrong or zero.

I wish that the Archer doesn't flood the network with DHCP requests.

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#11
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Re:Archer C6 DHCP request
2021-03-18 18:30:53 - last edited 2021-03-19 23:10:45

@teknoraver 

 

If the network status info from C6 is not important for you then the Kevin's quick fix will prevent these messages exchange.

The changes regarding DHCP requests frequency would require a new FW version release.

 

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