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+---
+slug: neighbor-table-supersedes-arp-table
+title: "Neighbor Table supersedes ARP Table – supporting IPv6"
+description: "NETworkManager replaces the ARP Table with the new Neighbor Table, which covers both IPv4 (ARP) and IPv6 (NDP) address-to-MAC mappings in a single unified view."
+authors: [borntoberoot]
+tags: [neighbor table, arp, ndp, ipv6, refactoring]
+keywords: [NETworkManager, neighbor table, ARP table, ARP, NDP, IPv6, IPv4, MAC address, neighbor discovery, address resolution]
+---
+
+The `ARP Table` feature has been replaced by the new **Neighbor Table**, a unified view that covers IP-to-MAC address mappings for both IPv4 (ARP) and IPv6 (NDP) in a single place.
+
+![Neighbor Table](./neighbor-table.png)
+
+<!-- truncate -->
+
+## Why the change?
+
+The old ARP Table only surfaced IPv4 entries. Modern networks increasingly rely on IPv6, and the equivalent mechanism on IPv6 – the **Neighbor Discovery Protocol (NDP)** – was left out entirely.
+
+Rather than adding a separate IPv6 view, NETworkManager now provides a single **Neighbor Table** that shows both IPv4 and IPv6 neighbors side by side, reflecting what the Windows networking stack actually maintains.
+
+## ARP vs. NDP — what's the difference?
+
+**IPv4 – ARP (Address Resolution Protocol)** is a layer-2 protocol that maps IPv4 addresses to MAC addresses. When a device needs to send data to an IPv4 address, it first checks the ARP cache. If no entry is found, it broadcasts an ARP request; the target replies with its MAC address and the entry is cached.
+
+**IPv6 – NDP (Neighbor Discovery Protocol)** fulfills the same purpose for IPv6. Instead of broadcasts, NDP uses ICMPv6 Neighbor Solicitation and Advertisement messages sent to a solicited-node multicast address — making it more efficient and multicast-friendly.
+
+Both protocols are susceptible to spoofing/poisoning attacks that can manipulate cached mappings and lead to man-in-the-middle scenarios.
+
+## What the Neighbor Table shows
+
+Each row in the table represents one cached neighbor entry and includes:
+
+| Column | Description |
+| --- | --- |
+| **IP Address** | IPv4 or IPv6 address of the cached neighbor. |
+| **Interface** | Human-readable name of the network interface (e.g. `Ethernet`, `Wi-Fi`). |
+| **MAC Address** | Link-layer (MAC) address associated with the IP address. |
+| **State** | Current reachability state (Reachable, Stale, Permanent, …). |
+| **Multicast** | Indicates whether the IP address is a multicast address. |
+
+You can refresh the table at any time with `F5`, and right-click any row to copy or export individual values, or to delete the selected entry.
+
+## Adding static entries
+
+You can also add permanent static neighbor entries — useful for pinning a critical device's MAC address so that ARP/NDP spoofing cannot redirect its traffic.
+
+![Add entry](./neighbor-table-entry.png)
+
+Click **Add entry...** below the table, supply an IPv4 or IPv6 address, the target MAC address, and the interface — NETworkManager takes care of the rest using `New-NetNeighbor` under the hood.
+
+:::note
+
+Adding and deleting neighbor entries requires administrator privileges. If NETworkManager is not running as administrator, the view is in read-only mode. Use the **Restart as administrator** button to relaunch with elevated rights.
+
+:::
+
+## Try it now
+
+You can test this feature in the [latest pre-release of NETworkManager](https://borntoberoot.net/NETworkManager/download#pre-release).
+
+More details are available in the [official documentation](https://borntoberoot.net/NETworkManager/docs/application/neighbor-table).
+
+If you find any issues or have suggestions, please open an [issue on GitHub](https://github.com/BornToBeRoot/NETworkManager/issues).
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