Slow (LAN) Network Performance
Posted on 2011-05-10
We’re experiencing some speed issues on our LAN. Intermittently throughout the day, when a user opens a mapped network drive, it can take up to 30 seconds or longer for the contents of the directory to appear. Once the folder’s been opened, I can close & re-open that drive in Windows Explorer without a problem. But then if I try to browse the same share a while later, it stalls again. This appears to be happening with multiple users accessing various shares located on either one of our domain controllers/file servers.
We moved less then a year ago & the issue became extremely apparent once we were in our new location. We had a consultant setup & configure our switches at our old location, but due to tight budgets, I didn’t have the luxury of using the consultant & personally set these back up after we moved. I’m afraid that due to my lack of knowledge on the switches, that I may have set them back up incorrectly, but I don’t know how to confirm that. I did check my notes & noticed that I didn’t have the switches setup like the consultant originally did, but thought I had resolved it since it seemed to be better for a while…but apparently not.
Basically, the consultant setup switch “A” with aggregated pairs of ports for each of the switches to connect from/to.
1. Switch “A” ports 39 & 40 to Switch “B” ports 47 & 48
2. Switch “A” ports 41 & 42 to Switch “C” ports 47 & 48
3. Switch “A” ports 43 & 44 to Switch “D” ports 47 & 48
Half of the servers are directly connected to Switch “A” & the others to Switch “D”
Here are some basics regarding our network setup:
1. The shared network drives are mapped at logon via a kixstart script.
2. 2 Domain Controllers running Windows 2003 Standard: DC1 (DNS & DHCP) & DC2 (WSUS)
3. 1 Exchange 2003 server
4. 1 Windows 2003 Standard running IceWarp & Exchange 2003 (for smartphone email access & spam filtering)
5. 1 SonicWALL NSA 2400
6. 4 3Com Baseline 2948 switches
7. 33 Windows XP Pro workstations
Thanks in advanced for the help!