97 definitions associated with DHCP.
97 matching terms
Page 4 of 5A failover state in which one server is administratively or automatically authorized to assume broader responsibility because its peer is considered unavailable. Entering the state incorrectly can create duplicate allocation risk.
Read definitionConfiguration selected based on the client's network link, usually identified by GIADDR, link-address, interface, relay information, or subnet selection options.
Read definitionA collection of resources from which a service selects a member. In DHCP it is an address range; in GSLB or load balancing it is a group of application endpoints.
Read definitionA state in which no eligible addresses or prefixes remain for new clients. Causes include genuine growth, excessive lease duration, starvation attacks, stale leases, exclusions, or a poorly sized subnet.
Read definitionAn option code range reserved for local or vendor use rather than global standardization. Private-use codes can collide when devices or organizations expect different meanings.
Read definitionPreboot Execution Environment, a framework that uses DHCP and a boot transfer protocol to start a system from the network. DHCP identifies architecture, boot server, and boot file or menu information.
Read definitionAn intermediary that forwards DHCP traffic between clients and servers on different links and supplies link or subscriber context. DHCPv4 and DHCPv6 relay formats differ.
Read definitionA client indication that it no longer needs an assigned address or prefix. Because release messages can be lost, leases still require finite lifetimes and expiration handling.
Read definitionThe process by which a client asks to extend an existing binding before it expires. DHCPv4 normally starts renewal at T1, while DHCPv6 uses a RENEW message to the server that supplied the binding.
Read definitionA configured association between a client identity and a specific address or set of options. Product semantics vary regarding whether the reserved address is inside a dynamic pool and whether it creates DNS data.
Read definitionA context defining which addresses, options, or policies apply. Microsoft DHCP uses scope for an IPv4 subnet and pool, while other systems may use the term for IPv6 reachability or administrative visibility.
Read definitionA DHCP option configured at a particular hierarchy level, such as server, scope, policy, reservation, or class. More-specific settings often override inherited values according to product precedence.
Read definitionThe amount of a DHCP scope currently leased, reserved, excluded, or available. Alerts should account for addresses that are not eligible for ordinary allocation.
Read definitionA value identifying the DHCP server participating in a transaction. DHCPv4 commonly uses option 54 with an IPv4 address, while DHCPv6 uses a DUID in OPTION_SERVERID.
Read definitionA DHCP option code intended for local site use. Such options can conflict across organizations and should be carefully documented when networks merge or devices move.
Read definitionA legacy DHCPv4 availability design in which two independent servers each own a non-overlapping portion of a subnet's address range, often in an 80/20 ratio. DHCP failover is generally preferred when supported.
Read definitionA persistent client-to-address association configured by an administrator. Products may implement it as a reservation, fixed address, manual allocation, or host object.
Read definitionA typed field nested within another DHCP option, such as circuit ID inside option 82 or vendor-specific data inside an enterprise container. Its namespace is defined by the parent option.
Read definitionA Microsoft DHCP grouping of multiple IPv4 scopes on the same physical network. It supports multinets where several logical subnets share one broadcast domain, but routing and client behavior must be designed carefully.
Read definitionThe renewal timer. DHCPv4 clients normally begin unicast renewal at T1, often 50 percent of lease time; DHCPv6 identity associations also carry T1 values.
Read definitionThe rebinding timer. If renewal has not succeeded by T2, the client broadens its attempt to any available server, often around 87.5 percent of DHCPv4 lease time by default.
Read definitionClient-provided classification data used to select DHCP policy. DHCPv4 uses option 77, while DHCPv6 has OPTION_USER_CLASS.
Read definitionClient information identifying a vendor, device family, or functional class. Servers use it for matching policies and returning vendor-specific configuration.
Read definitionA DHCP option or nested option whose meaning is defined by a vendor or enterprise namespace. Standardized enterprise-number containers reduce collisions compared with uncoordinated private codes.
Read definition