NoteHKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
| Data type | Range | Default value |
|---|---|---|
| REG_DWORD | 0x0 - 0xFFFFFFFE seconds | 0xFFFFFFFF | 0x258 (600 seconds = 10 minutes) |
Determines how long referenced entries must remain in the Address Resolution Protocol (ARP) cache table before they can be deleted.
By default, the value of ArpCacheLife determines the duration of unreferenced entries (2 minutes by default) and ArpCacheMinReferencedLife determines the duration of referenced entries. However, referenced entries must remain at least as long as unreferenced entries. Therefore, if the value of ArpCacheLife is greater than or equal to the value of ArpCacheMinReferencedLife, then ArpCacheMinReferencedLife is ignored and ArpCacheLife determines how long both referenced and unreferenced entries remain in the table.
| Value | Meaning |
|---|---|
| 0x0 - 0xFFFFFFFE seconds | The minimum lifetime of unreferenced ARP cache entries. |
| 0xFFFFFFFF | No minimum lifetime is enforced. |
Note
This value does not affect ARP cache table entries that are added manually. TCP/IP does not remove manual entries.
Windows 2000 does not add this entry to the registry. You can add it by editing the registry or by using a program that edits the registry.
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