HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
| Data type | Range | Default value |
|---|---|---|
| REG_DWORD | 0x0 | 0x1 - 0xFFFFFFFE bytes | 0xFFFFFFFF | (Varies with the system and amount of physical memory on the computer. See below.) |
Determines the maximum amount of system memory TCP can allocate for the routing table and its data.
| Value | Meaning |
|---|---|
| 0x0 | No TCP routing table. |
| 0x1 - 0xFFFFFFFE | Specifies the maximum amount of system memory that can be allocated to the TCP routing table. |
| 0xFFFFFFFF | There is no limit on the amount of system memory that TCP can allocate to the TCP routing table. |
The default value for this entry is determined by the amount of physical memory on the computer when TCP/IP starts and the version of the Windows running on the computer, as shown in the following table.
| Amount of physical memory on the computer | Windows 2000 Server | Windows 2000 Professional |
|---|---|---|
| Less than 19 MB | 0x25800 (150 KB = 1,000 routes) | 0x25800 (150 KB = 1,000 routes) |
| 19 - 63 MB | 0x180000 (1.5 MB = 10,000 routes) | |
| 64 MB or more | 0x500000 (5 MB = 40,000 routes) |