NLB works fine ... until AC Cluster creation

[Bernd]

Hello !

I've setup a NLB Cluster with 2 server (W2k3, SP1, 2 NICs,).
I configured the Cluster with the NLB Manager for multicast operation.
It works fine, I can reach the Web Sites (displaying
WshNetwork.ComputerName) with both, dedicated and virtual IP adresses.
When I create a AC Cluster (with keeping NLB configuration), i get a "IP
address conflict" message at the controler and there is no (HTTP) response
from the dedicated IP address of the second Cluster member. The Cluster
controler answers correctly to GET requests either with the dedicated IP
address and with the VIP but when NLB switches to the second member I get no
answer.
What setting is changed during AC Cluster creation ?

C:\>ac loadbalance /status:all
Application Center 2000 Command-Line Utility. (C) Copyright 2000 Microsoft
Corp
.

Load balancing Settings for DExxxxxxxx10:
Load balancing: enabled
Status: online
Weight: equal
Load balancing Settings for DExxxxxxxx11:
Load balancing: enabled
Status: online
Weight: equal
Command completed successfully.

Best regards
Bernd

[George Cheng [MSFT]]

What does the bottem of WLBS Display say? What kind of switch is this?

Thank You

George Cheng

Application Center2000/Index Server/Commerce Server Support

Application Center 2000 SP2 and Windows 2003 SP1
891330 You may experience problems after you install Windows Server 2003
Service Pack 1 on a server that is running Application Center 2000

http://download.microsoft.com/download/b/4/4/b44a9ae4-745e-4015-a4f3-7218096
89d65/HotfixQFE891330.exe

Note: This article has no warranties implicit or explicit.
All the content is given on the "as is" basis and the user
takes full responsibility for its use and assumption.
Microsoft Corporation Copyright 2005
All Rights Reserved

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Thread-Topic: NLB works fine ... until AC Cluster creation
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Subject: NLB works fine ... until AC Cluster creation
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Hello !

I've setup a NLB Cluster with 2 server (W2k3, SP1, 2 NICs,).
I configured the Cluster with the NLB Manager for multicast operation.
It works fine, I can reach the Web Sites (displaying
WshNetwork.ComputerName) with both, dedicated and virtual IP adresses.
When I create a AC Cluster (with keeping NLB configuration), i get a "IP
address conflict" message at the controler and there is no (HTTP) response
from the dedicated IP address of the second Cluster member. The Cluster
controler answers correctly to GET requests either with the dedicated IP
address and with the VIP but when NLB switches to the second member I get
no
answer.
What setting is changed during AC Cluster creation ?

C:\>ac loadbalance /status:all
Application Center 2000 Command-Line Utility. (C) Copyright 2000 Microsoft

[Bernd]

Hi George,

thanks for Your answer.

Output of WLBS QUERY (last lines)

=== Current state: ===

Host 1 has entered a converging state 4 time(s) since joining the cluster
and the last convergence completed at approximately: 10.05.2006 10:47:44
Host 1 converged as DEFAULT with the following host(s) as part of the cluster:
1, 2

=== Current state: ===

Host 2 has entered a converging state 1 time(s) since joining the cluster
and the last convergence completed at approximately: 10.05.2006 10:47:44
Host 2 converged with the following host(s) as part of the cluster:
1, 2

Host 1
C:\wlbs queryport 10.xxx.xxx.10:80
WLBS Cluster Control Utility V2.4 (c) 1997-2003 Microsoft Corporation.
Cluster 10.xxx.xxx.10
Retrieving state for port rule 10.xxx.xxx.10:80
Rule is enabled
Packets: Accepted=40, Dropped=15

Host 2
C:\wlbs queryport 10.xxx.xxx.10:80
WLBS Cluster Control Utility V2.4 (c) 1997-2003 Microsoft Corporation.
Cluster 10.xxx.xxx.10
Retrieving state for port rule 10.xxx.xxx.10:80
Rule is enabled
Packets: Accepted=15, Dropped=40

Switch is a Cisco 2950, VLAN defined for loadbalanced adapters,
connected to a Extreme Alpine Switch with static route defined for Cluster VIP

Best regards
Bernd

[George Cheng [MSFT]]

Is that a Layer 2 or Layer 3 switch?

Thank You

George Cheng

Application Center2000/Index Server/Commerce Server Support

Application Center 2000 SP2 and Windows 2003 SP1
891330 You may experience problems after you install Windows Server 2003
Service Pack 1 on a server that is running Application Center 2000

http://download.microsoft.com/download/b/4/4/b44a9ae4-745e-4015-a4f3-7218096
89d65/HotfixQFE891330.exe

Note: This article has no warranties implicit or explicit.
All the content is given on the "as is" basis and the user
takes full responsibility for its use and assumption.
Microsoft Corporation Copyright 2005
All Rights Reserved

--------------------
Thread-Topic: NLB works fine ... until AC Cluster creation
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Subject: RE: NLB works fine ... until AC Cluster creation
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Hi George,

thanks for Your answer.

Output of WLBS QUERY (last lines)

=== Current state: ===

Host 1 has entered a converging state 4 time(s) since joining the cluster
and the last convergence completed at approximately: 10.05.2006 10:47:44
Host 1 converged as DEFAULT with the following host(s) as part of the
cluster:
1, 2

=== Current state: ===

Host 2 has entered a converging state 1 time(s) since joining the cluster
and the last convergence completed at approximately: 10.05.2006 10:47:44
Host 2 converged with the following host(s) as part of the cluster:
1, 2

Host 1
C:\wlbs queryport 10.xxx.xxx.10:80
WLBS Cluster Control Utility V2.4 (c) 1997-2003 Microsoft Corporation.
Cluster 10.xxx.xxx.10
Retrieving state for port rule 10.xxx.xxx.10:80
Rule is enabled
Packets: Accepted=40, Dropped=15

Host 2
C:\wlbs queryport 10.xxx.xxx.10:80
WLBS Cluster Control Utility V2.4 (c) 1997-2003 Microsoft Corporation.
Cluster 10.xxx.xxx.10
Retrieving state for port rule 10.xxx.xxx.10:80
Rule is enabled
Packets: Accepted=15, Dropped=40

Switch is a Cisco 2950, VLAN defined for loadbalanced adapters,
connected to a Extreme Alpine Switch with static route defined for Cluster
VIP

Best regards
Bernd

[Bernd]

Cisco 2950 is a Layer 2 switch.
The Alpine switch has Layer 3 capabilities.

I think, if it is a problem with the switch, NLB without AC wound't work.
I cannot find changes in the NLB configuration after AC cluster creation.
Maybe that there is a setting in the Metabase ...

Do You know an AC Expert Consultant in Germany, who might help us ?

Thank's
Bernd

[George Cheng [MSFT]]

You may trying creating a cluster without NLB and see if it makes a
difference.
To take the switch out of the picture, plug both front end nics into a hub
and then into a switch.
We do have support in Germany. You could open a case with them.
Thank You

George Cheng

Application Center2000/Index Server/Commerce Server Support

Application Center 2000 SP2 and Windows 2003 SP1
891330 You may experience problems after you install Windows Server 2003
Service Pack 1 on a server that is running Application Center 2000

http://download.microsoft.com/download/b/4/4/b44a9ae4-745e-4015-a4f3-7218096
89d65/HotfixQFE891330.exe

Note: This article has no warranties implicit or explicit.
All the content is given on the "as is" basis and the user
takes full responsibility for its use and assumption.
Microsoft Corporation Copyright 2005
All Rights Reserved

--------------------
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Subject: RE: NLB works fine ... until AC Cluster creation
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Cisco 2950 is a Layer 2 switch.
The Alpine switch has Layer 3 capabilities.

I think, if it is a problem with the switch, NLB without AC wound't work.
I cannot find changes in the NLB configuration after AC cluster creation.
Maybe that there is a setting in the Metabase ...

Do You know an AC Expert Consultant in Germany, who might help us ?

Thank's
Bernd