What are the differences in the network functions of Windows Server 2008? Please see the introduction to this article.
1. There is absolutely no limit on the number of TCP/IP half-open connections.
2. The protocol stack design of Windows Server 2008 is basically the same as that of Vista. Compared with XP or 2003, it is a newly designed protocol stack with relatively large changes in architecture. Overall, the performance has been greatly improved.
3. Although it is a redesigned protocol stack, the basic behavior has not changed much from the previous system. The most easily accessible change is that TCP Window auto Scaling is turned on by default.
This feature is a new feature designed according to the RFC1323 standard. It is intended to enhance TCP performance under high bandwidth conditions. The RFC can be found here: http://www.ietf.org/rfc/rfc1323.txt
Note that turning on this feature may cause performance regression on some network devices. The reason is that some stateful firewalls/VPNs/tunnels/routing and other devices are designed to destroy the behavior of TCP Window, resulting in performance problems.
Therefore, if anyone feels that the network performance of Vista/2008 is abnormal compared to XP/2003, it is possible that there is such problematic software and hardware in your network environment. The solution is to temporarily disable these software and hardware. If you really cannot locate or avoid these devices, you can temporarily turn off the TCP Window Scaling feature. The method is as follows:
netsh interface tcp set global autotuninglevel=disabled
The command to enable this feature is as follows:
netsh interface tcp set global autotuninglevel=normal
4. If you encounter a big difference in network performance between Vista and 2008, it is probably your own RP problem.
5. Do not use the old so-called network optimization tools for XP/2003 under any circumstances. Some of the parameters modified by these tools may no longer be meaningful, or the modifications may cause inexplicable problems. Some well-known examples are Are those "optimizations" that modify the MTU or customize the TCP Window?