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Can ISC and KEA DHCP coexist?
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Topic: Can ISC and KEA DHCP coexist? (Read 522 times)
c-mu
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Can ISC and KEA DHCP coexist?
«
on:
September 13, 2024, 08:23:14 am »
I have many VLANs where the classic ISC DHCP SErver does its job. Now I wanted to deactivate ISC and activate KEA in one VLAN as a test, but I can't get a DHCP lease. I don't see any errors in the log file and the KEA service starts. Do I have to disable ISC on all interfaces for it to work?
I have already configured the corresponding subnet in KEA and checked it three times. But after deactivating ISC and activating KEA on that specific VLAN, my client does not get a DHCP lease on the VLAN.
Thank you!
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franco
Administrator
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Posts: 17717
Karma: 1618
Re: Can ISC and KEA DHCP coexist?
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Reply #1 on:
September 13, 2024, 08:30:16 am »
No, as long as ISC DHCP is running you cannot run Kea. This is by ISC DHCP design claiming the DHCP server port for itself exclusively. Kea doesn't do that, but also can't do anything about it.
Cheers,
Franco
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c-mu
Full Member
Posts: 210
Karma: 5
Re: Can ISC and KEA DHCP coexist?
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Reply #2 on:
September 13, 2024, 08:33:26 am »
Hi Franco,
even if ISC is deactivated on the interface and only KEA is listening?
Well, then I have to change all interfaces at once.
Many thanks for the quick answer!
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franco
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Re: Can ISC and KEA DHCP coexist?
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Reply #3 on:
September 13, 2024, 08:34:55 am »
Kea will bind to a specific interface per instance. ISC DHCP will bind to all even if just enabled for one.
Cheers,
Franco
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c-mu
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Posts: 210
Karma: 5
Re: Can ISC and KEA DHCP coexist?
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Reply #4 on:
September 13, 2024, 04:22:59 pm »
I am a bit confused. is there a general “Disable ISC” option? I have now disabled the server for all interfaces below ISC and enabled kea. I also get an IP address, but apparently not from KEA, the log file + the lease overview remains empty.
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franco
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Posts: 17717
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Re: Can ISC and KEA DHCP coexist?
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Reply #5 on:
September 13, 2024, 04:25:49 pm »
> is there a general “Disable ISC” option
No. Disable all DHCPv4 servers and best to reboot as well.
Cheers,
Franco
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Can ISC and KEA DHCP coexist?