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What happens if there are 2 DHCP servers?
Because two DHCP servers cannot serve the same addresses, address pools defined for a subnet must be unique across DHCP servers. If you use more than one DHCP server in your network, each server must be configured with their own unique IP address ranges.
How do I choose DHCP?
To get IP settings automatically using DHCP, select Obtain an IP address automatically, and then select OK. To specify an IP address, select Use the following IP address, and then, in the IP address, Subnet mask, and Default gateway boxes, type the IP address settings.
How a DHCP server is prioritized by a client among multiple DHCP servers?
The DHCP RFC says that if a client receives multiple DHCP OFFERs (e.g. from multiple servers), the client gets to decide which OFFER it accepts. But it leaves that selection algorithm as an implementation detail for the DHCP client implementers.
Can you have multiple DHCP scopes?
The Multiple DHCP Scopes per Interface feature allows one DHCP server to manage different scopes for clients spanning multiple subnets. Efficiency – A single DHCP server can provide IP addresses for clients spanning multiple subnets.
Is it normal to have multiple DHCP servers?
The key phrase in this answer is “competing DHCP servers”, meaning two or more DHCP servers configured with the same Scope IP address range. It’s perfectly normal to have multiple DHCP servers servicing clients so long as they are configured in such a way as to not assign ip addresses in a manner that would create an ip address conflict.
How is the IP address of a DHCP server selected?
If more than one DHCP server responds on the same subnet and hence the client receives multiple DHCP Offer messages, it selects one of the DHCP servers, and enters the IP address of the selected DHCP server in the DHCP Server Identifier (option 54) field of the DHCP Request message.
How does a DHCP server offer configuration parameters?
A DHCP server offers configuration parameters (such as an IP address, a MAC address, a domain name, and a lease for the IP address) to the client in a DHCPOFFER unicast message. A DHCP client may receive offers from multiple DHCP servers and can accept any one of the offers; however, the client usually accepts the first offer it receives.
How does DHCP work on a simple network?
DHCP on a simple network works using the DORA principle. Discovery – the client broadcasts a message on the local network segment its connected to, to discover available DHCP servers. Offer – a suitably configured DHCP server receives a request from a client, and offers it an address from its pool of available addresses.