Reverse delegation
Delegation of authority for part of in-addr.arpa or ip6.arpa to the organization responsible for an address block. IPv4 prefixes not aligned on octet boundaries may require RFC 2317 techniques.
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Browse the glossaryIPAM glossary — page 3
63 definitions associated with IPAM.
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Page 3 of 3RIR
Regional Internet Registry, one of the organizations that allocate and register IP address and autonomous system number resources within a service region. The five RIRs are AFRINIC, APNIC, ARIN, LACNIC, and RIPE NCC.
Read definitionRoute aggregation
Combining multiple contiguous prefixes into a larger summary route. Hierarchical address planning preserves aggregation and reduces routing-table size and policy complexity.
Read definitionRouting domain
A set of interfaces and prefixes sharing a routing table or routing policy context. VRFs and tenants can create separate domains with overlapping address space.
Read definitionScope
A 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 definitionScope utilization
The amount of a DHCP scope currently leased, reserved, excluded, or available. Alerts should account for addresses that are not eligible for ordinary allocation.
Read definitionSource of truth
The system or governed data set designated as authoritative for a class of information. In DDI, one system may own intended allocation while discovery or DHCP owns observed runtime state, so ownership must be explicit.
Read definitionStale record
A record that no longer reflects the current device, address, owner, or service. Stale data can cause misrouting, security exposure, and incorrect capacity reports.
Read definitionSubnet
A prefix used as an on-link network or administrative allocation unit. In IPv4 it has a network mask and usually network and broadcast addresses; IPv6 LANs commonly use /64.
Read definitionSubnet ID
The portion of an address plan used to distinguish subnets within a larger assigned prefix. In IPv6 enterprise planning, it often refers to bits between the global routing prefix and the interface identifier.
Read definitionSupernet
A larger aggregate prefix that contains multiple smaller networks. Supernetting supports route summarization and hierarchical address management.
Read definitionTag
A label or key-value marker used to categorize DDI objects for search, automation, access control, reporting, or lifecycle policy. The exact feature may be called metadata, extensible attribute, or custom property.
Read definitionUnmanaged address
An address observed on the network but not represented as an approved assignment in IPAM. It may be legitimate shadow IT, stale discovery, a security issue, or a documentation gap.
Read definitionVLAN
Virtual LAN, a Layer 2 broadcast-domain segmentation identified by a VLAN ID on Ethernet networks. A VLAN often maps to one or more IP subnets, but the relationship is not inherently one-to-one.
Read definitionVRF
Virtual Routing and Forwarding, a separate routing-table context on a device or network. VRFs allow overlapping addresses and should be modeled explicitly in IPAM or network views.
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