Types of scopes in Windows DHCP
Types of scopes in windows DHCP
Normal Scope – Allows A, B, and C Class IP address ranges to be specified including subnet masks, exclusions and reservations. Each normal scope defined must exist within its own subnet.
Super scope – Group of scopes is called as super scope.
Essentially a collection of scopes grouped together such that they can be enabled and disabled as a single entity.
Multicast Scope – Used to assign IP address ranges for Class D networks. Multicast scopes do not have subnet masks, reservation or other TCP/IP options.
Multicast scope address ranges require that a Time To Live (TTL) value be specified (essentially the number of routers a packet can pass through on the way to its destination).
Multicast scopes are supported through a protocol known as the Multicast Address Dynamic Client Allocation Protocol (MADCAP).
MADCAP controls how the DHCP servers dynamically assign IPaddresses on a TCP/IP network. The multicast server is configured with a group of Class D IP addresses (in the range of 224.0.0.0–239.255.255.255) that can be assigned to multicast clients.
IP Reservation? Resolving a particular dynamic IP for a particularly system.
IP Reservation? is a specific IP address within a DHCP scope that is permanently reserved for leased use to a specific DHCP client.
IP exclusion? Omitting assigning from the range selected IPs.
Using the 80/20 rule for scopes: For balancing DHCP server usage, a good practice is to use the “80/20” rule to divide the scope addresses between the two DHCP servers.
Reconciling scopes: Reconciling scopes can fix inconsistencies, such as incorrect or missing information for client IP addresses that are stored in scope lease information.
Scope IP address lease information is stored in two forms by the DHCP Server service: Detailed IP address lease information, stored in the DHCP database. Summary IP address lease information, stored in the DHCP database.
Authentication DHCP server?
Enabling AD Know the availability of DHCP server Useful when we have multiple DHCP Server and you want to you designate one particular DHCP server to be active. Then we should authorize.
Purpose of DHCP Relay agent?