Hi,

We have a pool of CAS servers which are load balanced by a H/W load balancer.

In theory, load balancer should distribute the requests among them.

In practical, is there anyway that I can actually test this ?

I mean when I initiate a request, to which CAS server my request is actually pointing to when I access a mailbox via OWA ?

(OR) In general, how do we test which back-end server is servicing our request which are sitting behind LBs ?

Thank you in advance,

You can trace it at either HLB log, or CAS IIS log.

I do not have access to HLB as that is managed by different team.

CAS IIS log ?

Do you mean, I have to check all the 15 CAS servers logs for this ? (where my owa request has gone through ?)

I can't do that...

I knew one way of checking by using Fiddler.

Looking for any other bright ideas..

Hi Ragu,

As Li Zhen said and also up to my knowledge the only best method is to analyze the HLB logs .

Because in any one of the cas server if we use the netstat commands to find out the client connections ,we can able to see the ip address of the HLB instead of client ip address. 

I do not have access to HLB as that is managed by different team.

CAS IIS log ?

Do you mean, I have to check all the 15 CAS servers logs for this ? (where my owa request has gone through ?)

I can't do that...

I knew one way of checking by using Fiddler.

Looking for any other bright ideas..

If you have that much CAS, you can use LogParser which will search multiple files at the same time.

I do not have access to HLB as that is managed by different team.

CAS IIS log ?

Do you mean, I have to check all the 15 CAS servers logs for this ? (where my owa request has gone through ?)

I can't do that...

I knew one way of checking by using Fiddler.

Looking for any other bright ideas..

If you have that much CAS, you can use LogParser which will search multiple files at the same time.

• Marked as answer by Raghu.Ram 15 hours 47 minutes ago
• Unmarked as answer by Raghu.Ram 15 hours 47 minutes ago

Thank you all for the responses.

Hi Raghu

Thank you for your question.

If you want to test every CAS server has work for load balancer correctly?

We could add host record in host file which path is C:\windows\system32\drivers\etc, host record is IP and FQDN for a member of hardware load balancer;

The format of host file is IP address   FQDN, for example 192.168.1.1  CASServer1.domain.com, then we could test it by OWA or Outlook.

If there are any questions regarding this issue, please be free to let me know. 

Best Regard,

Jim