Subnet Mask Effecting Performance?
Posted on 2009-02-19
We've been diagnosing our network trying to determine where we're having slowdown issues. For example, from my desktop (Core Duo, 4gb ram, XP Pro) via a mapped drive letter to one of our servers, a copy & paste of a 4kb text file can take 10 seconds. Other times it is fast.
Mapped drives are a combination of UNC (such as \\servername\sharedfoldername) and IP address (\\192.168.2.2\sharedfoldername)
We're on a 10/100/1000 switch with many servers & desktops running gigabit connections.
One thing is that we have a subnet on the network of 255.255.128.0. We're wondering if changing this to 255.255.255.252 will help overall network performance. I don't want to just experiment - we'll have to change about 200 IP addresses on 40 machines (some of which are web servers, email servers, etc.).
I don't want to go for 255.255.255.0 if I can avoid it, as even more machines will need to be changed. That said, if there are performance gains to be had, it may be worth the time.
Any thoughts would be greatly appreciated!