I am rearranging our network and doing some DHCP failover, because we have many machines, even servers, using DHCP to obtain IP addresses.
Today we have a good DNS topology with a master server and two slave servers. DHCP provides slave addresses for clients and only allows recursion on slave servers. With this in mind, I want to do something Something similar to DHCP.
The main ideia has a primary DHCP server and two secondary servers. But the problem arises: I don’t know if it is a supported feature and there is a way to Put a lot of DHCP loads only on auxiliary devices, I haven’t found it in the documentation yet.
Here is the documentation on ISC DHCPd failover: https://kb.isc.org/article/ AA-00502/0/A-Basic-Guide-to-Configuring-DHCP-Failover.html; but it does not include my usage scenarios.
Thanks in advance,
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With DNS, there is a concept of recursive and authoritative queries, so what you do there-usually called a hidden master-makes sense Yes. You have a hidden master data, a copy of the data, copy it, and only enable recursion on the slave server.
With DHCP, there is no such concept; the DHCP server either does not reply, grant or Reject the lease. Whether it is based entirely on its configuration and lease database, not whether the DHCP request is “recursive”.
Especially in ISC dhcpd, there is no concept of “master”. You can run with the same configuration And two DHCP servers for failover, but cannot run the “master” server and two “slave” servers.
So – the function you want does not exist. There is no such thing, so you can’t do this Do.
If you don’t want to load DHCP on the hidden main server, please don’t run the DHCP server there.
If you want to run two servers and prepare to load from another server Take over, you should run failover, but be aware that it has warnings.
I am rescheduling our network and doing some DHCP failover because we have a lot of machines, Even the server uses DHCP to obtain an IP address.
Today we have a good DNS topology, with a master server and two slaves Server. DHCP provides slave addresses for clients and only allows recursion on slave servers. With this in mind, I want to do something similar to DHCP.
The main ideia has a master DHCP server And two secondary servers. But the problem arises: I don’t know, if it is a supported feature, and there is a way to put a lot of DHCP loads only on secondary devices, I haven’t found it in the documentation .
Here is the document about ISC DHCPd failover: https://kb.isc.org/article/AA-00502/0/A-Basic-Guide-to-Configuring-DHCP-Failover. html; But it does not include my usage scenarios.
Thanks in advance,
With DNS, there is a concept of recursive and authoritative query , So what you do there-usually called a hidden master-makes sense. You have a hidden master data, data, replica copy it, and only enable recursion on the slave server.
< p>With DHCP, there is no such concept; the DHCP server either does not reply, grants or rejects the lease. Whether it is based entirely on its configuration and lease database, not whether the DHCP request is “recursive”.
Especially In ISC dhcpd, there is no concept of “master”. You can run two DHCP servers with the same configuration and failover, but you cannot run a “master” server and two “slave” servers.
So – The function you want does not exist. There is no such thing, so you can’t do this.
If you don’t want to load DHCP on the hidden main server, please don’t run the DHCP server there.
If you want to run two servers and prepare to take over from another server, you should run failover, but be aware that it has warnings.
