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I-395 If you have many computers and routers on your LAN, you may want to consider source-routing with your NWLink protocol. NWLink has several registry entries that give you some control over how it uses source-routing. The following four values control the bulk of source-routing features.
Hive: | HKEY_LOCAL_MACHINE |
Key: | System\CurrentControlSet\Services\NWLink\NetConfig\ Driver01 |
Value Name: | SourceRouteBcast |
Data Type: | REG_DWORD |
Value: | 0 |
If this value is 0, the broadcast is transmitted to the single-route broadcast. If the value is set to 1, the all-routes broadcast is used. This setting can make a huge difference in network overhead.
I-396 | Hive: | HKEY_LOCAL_MACHINE |
Key: | System\CurrentControlSet\Services\NWLink\NetConfig\ Driver01 | |
Value Name: | SourceRouteDef | |
Data Type: | REG_DWORD | |
Value: | 0 |
This value is very similar to the SourceRouteBcast value; it affects those broadcasts destined for machines that are not in the route table. If NWLink finds the computer in the route table, it uses that route; otherwise, if the value is 0, it uses the single-route broadcast. If the value is 1, NWLink uses the all-routes broadcast.
I-397 | Hive: | HKEY_LOCAL_MACHINE |
Key: | System\CurrentControlSet\Services\NWLink\NetConfig\ Driver01 | |
Value Name: | SourceRouting | |
Data Type: | REG_DWORD | |
Value: | 0 |
This value specifies whether source-routing should be used on a Token-Ring adapter. This value pertains only to Token-Ring adapters.
I-398 | Hive: | HKEY_LOCAL_MACHINE |
Key: | System\CurrentControlSet\Services\NWLink\NetConfig\ Driver01 | |
Value Name: | SourceRouteMcast | |
Data Type: | REG_DWORD | |
Value: | 0 |
This value affects multicast addresses. If the value is 0, NWLink uses the single-route broadcast. If the value is 1, NWLink uses the all-routes broadcast.
I-399 These next seven values affect IPX/SPX globally. The values under the adapters section affect only a specific card; these values work for the whole NWLink transport.
Hive: | HKEY_LOCAL_MACHINE |
Key: | System\CurrentControlSet\Services\NWLink\Parameters |
Value Name: | WindowSize |
Data Type: | REG_DWORD |
Value: | 4 |
This value sets the number of packets the receiving node can receive at a time. The SPX protocol uses the allocation field of the SPX packet to inform remote nodes of the available window size. This value sets the allocation field in the SPX packet.
I-400 These next two values pertain to RIP on an IPX/SPX network. Altering these settings affects all adapters running NWLink.
Hive: | HKEY_LOCAL_MACHINE |
Key: | System\CurrentControlSet\Services\NWLink\Parameters |
Value Name: | RipCount |
Data Type: | REG_DWORD |
Value: | 5 |
This value determines how many times RIP tries to find a route on a network before it declares the route unusable. Depending on network traffic levels, adjusting this value can increase the likelihood that RIP finds routes.
I-401 | Hive: | HKEY_LOCAL_MACHINE |
Key: | System\CurrentControlSet\Services\NWLink\Parameters | |
Value Name: | RipTimeout | |
Data Type: | REG_DWORD | |
Value: | 1 |
This value works in conjunction with RipCount to determine in 500-millisecond intervals how long RIP waits between sending request packets for a particular route.
I-402 | Hive: | HKEY_LOCAL_MACHINE |
Key: | System\CurrentControlSet\Services\NWLink\Parameters | |
Value Name: | ConnectionCount | |
Data Type: | REG_DWORD | |
Value: | 10 |
This value determines how long NWLink tries to connect to a remote machine. If SPX does not get a response within the allotted number of tries, an error occurs. If you have a heavily congested network, tuning this parameter and the ConnectionTimeout parameter below may help you reduce connection timeouts.
I-403 | Hive: | HKEY_LOCAL_MACHINE |
Key: | System\CurrentControlSet\Services\NWLink\Parameters | |
Value Name: | ConnectionTimeout | |
Data Type: | REG_DWORD | |
Value: | 2 |
This value is how many 500-millisecond intervals NWLink waits between sending connection probes. A value of 2 represents 1 second. By increasing this value and decreasing the ConnectionTimeout value, you can reduce congestion and still maintain your connections.
I-404 | Hive: | HKEY_LOCAL_MACHINE |
Key: | System\CurrentControlSet\Services\NWLnkSpx\Parameters | |
Value Name: | KeepAliveTimeout | |
Data Type: | REG_DWORD | |
Value: | 12 |
This value is how many 500-millisecond intervals NWLink waits before sending a keep-alive packet to a remote station to verify that the SPX connection is still functioning.
I-405 | Hive: | HKEY_LOCAL_MACHINE |
Key: | System\CurrentControlSet\Services\NWLink\Parameters | |
Value Name: | KeepAliveCount | |
Data Type: | REG_DWORD | |
Value: | 12 |
This value is the number of keep-alive status requests that are sent. If you have long-term connections that are often idle for much of their connect life, you may want to tweak these parameters accordingly.
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