SetForwardBufferMemory method of the Win32_NetworkAdapterConfiguration class
The SetForwardBufferMemory WMI class static method is used to specify how much memory IP allocates to store packet data in the router packet queue.
This topic uses Managed Object Format (MOF) syntax. For more information about using this method, see Calling a Method.
Syntax
uint32 SetForwardBufferMemory(
[in] uint32 ForwardBufferMemory
);
Parameters
-
ForwardBufferMemory [in]
-
Size, in bytes, of the router packet queue used to store packet data. The default value is 74240 (fifty 1480-byte packets, rounded to a multiple of 256).
Return value
Returns a value of 0 (zero) for a successful completion when no reboot is required, 1 (one) for a successful completion when a reboot is required, and a different number if there is an error. For more information on error codes, see WMI Error Constants or WbemErrorEnum. For general HRESULT values, see System Error Codes.
-
Successful completion, no reboot required
-
0
Successful completion, no reboot required.
-
Successful completion, reboot required
-
1
Successful completion, reboot required.
-
Method not supported on this platform
-
64
Method not supported on this platform.
-
Unknown failure
-
65
Unknown failure.
-
Invalid subnet mask
-
66
Invalid subnet mask.
-
An error occurred while processing an Instance that was returned
-
67
An error occurred while processing an instance that was returned.
-
Invalid input parameter
-
68
Invalid input parameter.
-
More than 5 gateways specified
-
69
More than five gateways specified.
-
Invalid IP address
-
70
Invalid IP address.
-
Invalid gateway IP address
-
71
Invalid gateway IP address.
-
An error occurred while accessing the Registry for the requested information
-
72
An error occurred while accessing the registry for the requested information.
-
Invalid domain name
-
73
Invalid domain name.
-
Invalid host name
-
74
Invalid host name.
-
No primary/secondary WINS server defined
-
75
No primary or secondary WINS server defined.
-
Invalid file
-
76
Invalid file.
-
Invalid system path
-
77
Invalid system path.
-
File copy failed
-
78
File copy failed.
-
Invalid security parameter
-
79
Invalid security parameter.
-
Unable to configure TCP/IP service
-
80
Unable to configure TCP/IP service.
-
Unable to configure DHCP service
-
81
Unable to configure DHCP service.
-
Unable to renew DHCP lease
-
82
Unable to renew DHCP lease.
-
Unable to release DHCP lease
-
83
Unable to release DHCP lease.
-
IP not enabled on adapter
-
84
IP not enabled on adapter.
-
IPX not enabled on adapter
-
85
IPX not enabled on adapter.
-
Frame/network number bounds error
-
86
Frame or network number bounds error.
-
Invalid frame type
-
87
Invalid frame type.
-
Invalid network number
-
88
Invalid network number.
-
Duplicate network number
-
89
Duplicate network number.
-
Parameter out of bounds
-
90
Parameter out of bounds.
-
Access denied
-
91
Access denied.
-
Out of memory
-
92
Out of memory.
-
Already exists
-
93
Already exists.
-
Path, file or object not found
-
94
Path, file, or object not found.
-
Unable to notify service
-
95
Unable to notify service.
-
Unable to notify DNS service
-
96
Unable to notify DNS service.
-
Interface not configurable
-
97
Interface not configurable.
-
Not all DHCP leases could be released/renewed
-
98
Not all DHCP leases could be released or renewed.
-
DHCP not enabled on adapter
-
100
DHCP not enabled on adapter.
-
Other
-
101 4294967295
Remarks
When this buffer space is filled, the router begins discarding packets at random from its queue.
Packet queue data buffers are 256 bytes in length, so the value of the ForwardBufferMemory parameter should be a multiple of 256. Multiple buffers are chained together for larger packets. The IP header for a packet is stored separately. This parameter is ignored and no buffers are allocated if the IP router is not enabled. The buffer size can range from the network Maximum Transmission Unit (MTU) to a value smaller than 0xFFFFFFFF.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client |
Windows Vista |
| Minimum supported server |
Windows Server 2008 |
| Namespace |
Root\CIMV2 |
| MOF |
|
| DLL |
|