Microsoft KB Archive/329988

= PRB: Application Center 2000 May Remove IP Addresses from the Network Adapter During Member Addition =

Article ID: 329988

Article Last Modified on 6/20/2003

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APPLIES TO


 * Microsoft Application Center 2000 Standard Edition
 * Microsoft Application Center 2000 Standard Edition
 * Microsoft Application Center 2000 Service Pack 2

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This article was previously published under Q329988





SYMPTOMS
After you add a new server to an existing network load-balanced cluster, all except one of the static IP addresses that are bound to the front-end (load-balanced) network adapter are removed.



CAUSE
The first static IP address that is bound to a front-end network adapter in a network load-balanced cluster is used as a dedicated IP (DIP) address and remains bound to the network adapter after a server is joined to a network load-balanced cluster. All other static addresses that are on the network adapter are network load-balanced virtual IP (VIP) addresses and must match the VIPs that are on the cluster controller. The Application Center 2000 process to add a member removes any additional static IP addresses that are on the front end network adapter and replaces them with the VIP (or VIPs) from the cluster controller.



RESOLUTION
To resolve this problem, do not bind more than one static IP address to the front-end network adapter on a server that is to be added to an Application Center 2000 network load-balanced cluster.



STATUS
This behavior is by design.



Steps to Reproduce the Behavior

 * 1) Install Application Center 2000 on two servers that each have two network adapters (for example, server A and server B).
 * 2) On server A, bind two static IP addresses to a network adapter.
 * 3) On server B, bind two different static IP addresses to a network adapter (that is, make sure that the two different static IP addresses are also different from the addresses in step 2).
 * 4) Create a network load-balanced cluster on server A.

Notice that one of the static IP addresses is the VIP address of the cluster, and the other static IP address becomes the DIP for that server.
 * 1) Add server B to the cluster.

Notice that one of the static IP addresses on the member server becomes its DIP address, and the other static IP address is removed and replaced by the cluster VIP address.



Keywords: kbprb KB329988

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