Example: Upgrading the Existing NLB Cluster

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Applies To: Windows Server 2003, Windows Server 2003 R2, Windows Server 2003 with SP1, Windows Server 2003 with SP2

The organization mentioned in the examples earlier in this chapter is now ready to upgrade the existing VPN server farms. In this step, the organization performs a rolling upgrade on each cluster host in the VPN remote access server farm.

Each of the VPN remote access servers were upgraded in turn until the entire VPN remote access server farm was upgraded. Figure 9.10 illustrates the organization’s network environment after the upgrade of the cluster.

Figure 9.10   Network Environment After Upgrading the Cluster

Network Environment After Upgrading the Cluster

To upgrade the VPN remote access server farm, the following tasks were performed:

  1. Prevented client access on the VPN-01 cluster host by performing a drainstop on VPN-01.

  2. Monitored client activity on VPN-01 until all client activity ceased.

  3. Upgraded VPN-01.

  4. Verified that the applications and services are running correctly on VPN-01.

  5. Added VPN-01 back to the cluster.

  6. Performed steps 1 through 5 on the remaining VPN remote access servers.