Info about Network Load Balancing

[evai]

Hi,

i have 2 web site IIS on 2 server Windows 2000 ADV (server A 192.168.0.1 /24
and server B 192.168.0.2 /24) with a network load balancing configured with
balancing HTTP 80 and affinity dor Class C with virtual IP 192.168.0.10 /24
Both web site have the same virtual ip address (192.168.0.10), but i stop a
WWW Service on the first server (A) and try to connet with my browser on the
vitual web ip address (192.168.0.10) sometimes operates correctly (switch
on the web server B) bu if i reload a page sometimes return a error ,
sometimes never function a browser return a error and not view a page.
If i make a test with a "telnet myvirtualip on port 80" the connection NOT
estabilished.
What's happen ? Why my Netwok Load Balancing if a server fail do not switch
on the other web server ?
Netwok Load Balancing manage a webserver failover ?

Thanks in Advance.


Note: Windows 2000 ADV , SP3 +all fix

 

[Marc Reynolds [MSFT]]

NLB is not aware of the application status (in this case IIS). If you shut
down one node completely or disable the load balanced NIC, the traffic will
be picked up by the other NLB node.
To monitor application status you can use httpmon or a 3rd party app. See
234151 WLBS Does Not Detect Program or Service Problems
http://support.microsoft.com/?id=234151

--

Thanks,
Marc Reynolds
Microsoft Technical Support

This posting is provided "AS IS" with no warranties, and confers no rights.

 

[evai]

Thank you for your reply.

NLB is not aware of the application status (in this case IIS). If you shut
down one node completely or disable the load balanced NIC, the traffic will
be picked up by the other NLB node.
To monitor application status you can use httpmon or a 3rd party app. See
234151 WLBS Does Not Detect Program or Service Problems
http://support.microsoft.com/?id=234151

--

Thanks,
Marc Reynolds
Microsoft Technical Support

This posting is provided "AS IS" with no warranties, and confers no rights.


stop

 

[evai]

Sorry ,
a last question :

MSCS manage also a service failover ?
If i install a MSCS may i resolve this problem ?
Only with MSCS may i resolve the problem of balancing and failover of IIS ?

Thanks.