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Archer C4000 and C3200 - DHCP Server Fails after using Address Reservation
Archer C4000 and C3200 - DHCP Server Fails after using Address Reservation
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Archer C4000 and C3200 - DHCP Server Fails after using Address Reservation
This thread has been locked for further replies. You can start a new thread to share your ideas or ask questions.
Archer C4000 and C3200 - DHCP Server Fails after using Address Reservation
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Registered: 2018-08-22
2018-08-22 10:51:02 - last edited 2020-03-12 15:37:41
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Archer C4000 and C3200 - DHCP Server Fails after using Address Reservation
2018-08-22 10:51:02 - last edited 2020-03-12 15:37:41
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Model :
Hardware Version :
Firmware Version :
ISP :
I previously had a C3200 and replaced with a C4000. On both units, when I reserve multiple IPs outside of the DHCP pool range for my LAN, DHCP stops working. All DHCP clients can no longer get an IP from the pool. When I disable the address reservations, the DHCP Client List once again floods with clients that have been unable to get an IP. All the sudden, they work again. This is the strangest thing. Toggling the DHCP server and power cycling the router have no effect. The only way to restore DHCP server function is to disable the address reservations for all but 1 client.
IP Pool: 192.168.101 - 192.168.1.199
Gateway: 192.168.1.1
Address Reservations for 192.168.1.2, 192.168.1.3, 192.168.1.5 and 192.168.1.50.
Static IPs are assigned to an iMac, MacBook Pro, a home built FreeBSD server and an IP Camera.
All other clients (27 of them) are assigned via DHCP, ranging from Chromecasts, to echo devices, iPads, kindles, etc..
Knowledge background: I've worked over 10 years at a major telco provider on Layer 2 / Layer 3 access network management (DSLAM/VDSL/PON) and have extensive knowledge of IP.
Hardware Version :
Firmware Version :
ISP :
I previously had a C3200 and replaced with a C4000. On both units, when I reserve multiple IPs outside of the DHCP pool range for my LAN, DHCP stops working. All DHCP clients can no longer get an IP from the pool. When I disable the address reservations, the DHCP Client List once again floods with clients that have been unable to get an IP. All the sudden, they work again. This is the strangest thing. Toggling the DHCP server and power cycling the router have no effect. The only way to restore DHCP server function is to disable the address reservations for all but 1 client.
IP Pool: 192.168.101 - 192.168.1.199
Gateway: 192.168.1.1
Address Reservations for 192.168.1.2, 192.168.1.3, 192.168.1.5 and 192.168.1.50.
Static IPs are assigned to an iMac, MacBook Pro, a home built FreeBSD server and an IP Camera.
All other clients (27 of them) are assigned via DHCP, ranging from Chromecasts, to echo devices, iPads, kindles, etc..
Knowledge background: I've worked over 10 years at a major telco provider on Layer 2 / Layer 3 access network management (DSLAM/VDSL/PON) and have extensive knowledge of IP.
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Re:Archer C4000 and C3200 - DHCP Server Fails after using Address Reservation-Solution
2019-10-08 02:50:01 - last edited 2020-03-12 15:37:41
@archerboy not sure if you are having the same problem, but there is a major design flaw of the Archer software. It will allow you to assign a name to reserved IP's with spaces in them. But the spaces will cause a DCHP error and will stop assigning IPs.
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2019-10-17 13:36:38
Thanks for the workaround to this bug. TP-link, this needs to be fixed! I was ready to return the router but stumbled across this page to find this is a very old issue for this router.
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2019-10-17 15:09:28
Glad that help. This is a long time issue that TP-Link should resolve with a firmware update. But this is a workaround that makes a great router work as it is expected to.
Emil
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Re:Archer C4000 and C3200 - DHCP Server Fails after using Address Reservation
2019-10-17 19:42:28
My C-4000 did the same thing yesterday after changing one of the reserved devices. None of the non-reserved wireless devices were assigned DHCP IP addresses anymore. I called tech support and they just had me reset the router to factory defaults. After having to go through setup all over again, when I tried reserving some IP addresses, I lost all the DHCP devices again. I'm sure that I probably used some device names with more than one contiguous word. Interesting that TP-Link's tech support department does not even seem to be aware of this firmware issue.
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2018-08-22 10:51:02 - last edited 2020-03-12 15:37:41
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Registered: 2018-08-22
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