Compaq ProLiant 6400R Compaq Parallel Database Cluster Model PDC/05000 for Ora - Page 64
Ethernet Cluster Interconnect Components, Ethernet Switch
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2-40 Compaq Parallel Database Cluster Model PDC/O5000 for Oracle8i and Windows 2000 Administrator Guide Ethernet Cluster Interconnect Components The following components are used in a redundant Ethernet cluster interconnect: I Two Ethernet adapters in each cluster node I Ethernet cables and switches or hubs G For two-node PDC/O5000 clusters, you can use two 100-Mbit/second Ethernet switches or hubs with cables to connect the servers. G For PDC/O5000 clusters with three or more nodes, you use two 100-Mbit/second Ethernet switches connected by Ethernet cables to a separate Ethernet adapter in each server. NOTE: In a redundant Ethernet cluster configuration, one Ethernet crossover cable must be installed between the two Ethernet switches or hubs that are dedicated to the cluster interconnect. Ethernet Cluster Interconnect Adapters To implement the Ethernet cluster interconnect, each cluster node must be equipped with Ethernet adapters capable of 100-Mbit/second transfer rates. Some adapters may be capable of operating at both 10-Mbit/second and 100-Mbit/second; however, Ethernet adapters used for the cluster interconnect must run at 100-Mbit/second. The Ethernet adapters must have passed Windows 2000 Advanced Server HCT certification. For more information about installing an Ethernet cluster interconnect, see Chapter 5, "Installation and Configuration." Ethernet Switch IMPORTANT: The Ethernet switch or switches used with the Ethernet cluster interconnect must be dedicated to the cluster interconnect. They cannot be connected to the client network (LAN) or to servers that are not part of the PDC/O5000 cluster. When an Ethernet cluster interconnect is used in a cluster with three or more nodes, a 100-Mbit/second Ethernet switch is required for the cluster interconnect path. The 100-Mbit/second Ethernet switch handles the higher network loads essential to the uninterrupted operation of the cluster. An Ethernet hub cannot be used.