MS NLB cause slowness to IIS access
Posted on 2013-01-08
We have 6 web servers running IIS on Win 2003 Enterprise.
We have one NLB VIP configured to load balance among these
6 web servers.
Today, for some reason, users complain for 7 over hours of slowness
till we configure users' PCs to directly access the web servers' actual
IP addresses (we try to group users for each of the 6 web servers).
My Wintel sysadmins says the NLB GUI showed the number of users
http connections are quite evenly distributed during that 7 hours of
Now, even with 1 single user pointing to this NLB VIP, it's still slow
while all the rest of the organization's users are Ok (as they're
now directly accessing the actual IP of each web servers).
Any logs to check & how to troubleshoot this further?
Could it be the Cisco switch's issue & what to check on the
switch? There's no hardware load balancer used.
CPU, RAM utilizations on all web servers are well below 30%