Compaq ProLiant 6400R Compaq Parallel Database Cluster Model PDC/O1000 for Ora - Page 51

Ethernet switches or hubs provided for the cluster interconnect. The bottom

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2-28 Compaq Parallel Database Cluster Model PDC/O1000 for Oracle8i and Windows 2000 Administrator Guide Because Ethernet switches are required in PDC/O1000 clusters with three or more nodes, using an Ethernet switch instead of a crossover cable makes it easier to upgrade the cluster interconnect if more servers are added to the cluster. IMPORTANT: Crossover cables and Ethernet hubs cannot be used in PDC/O1000 clusters with a redundant Ethernet cluster interconnect or in PDC/O1000 clusters with three or more nodes. Figure 2-14 shows the redundant Ethernet cluster interconnect components used in a two-node PDC/O1000 cluster. Ethernet Switch/Hub #2 for Cluster Interconnect Dual-port Ethernet Adapters (2) Ethernet Switch/Hub #1 for Cluster Interconnect Crossover Cable Dual-port Ethernet Adapters (2) Node 1 Crossover Cable Client LAN Hub/Switch #2 Node 2 Client LAN Hub/Switch #1 Figure 2-14. Redundant Ethernet cluster interconnect for a two-node PDC/O1000 cluster These components include two dual-port Ethernet adapters in each cluster node. The top port on each adapter connects by Ethernet cable to one of two Ethernet switches or hubs provided for the cluster interconnect. The bottom port on each adapter connects by Ethernet cable to the client LAN for the cluster. A crossover cable is installed between the two Ethernet switches or hubs used in the Ethernet cluster interconnect.

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2-28
Compaq Parallel Database Cluster Model PDC/O1000 for Oracle8i and Windows 2000 Administrator Guide
Because Ethernet switches are required in PDC/O1000 clusters with three or
more nodes, using an Ethernet switch instead of a crossover cable makes it
easier to upgrade the cluster interconnect if more servers are added to the
cluster.
IMPORTANT:
Crossover cables and Ethernet hubs cannot be used in PDC/O1000 clusters
with a redundant Ethernet cluster interconnect or in PDC/O1000 clusters with three or
more nodes.
Figure 2-14 shows the redundant Ethernet cluster interconnect components
used in a two-node PDC/O1000 cluster.
Node 1
Node 2
Client LAN
Hub/Switch #1
Client LAN
Hub/Switch #2
Ethernet Switch/Hub #2
for Cluster Interconnect
Ethernet Switch/Hub #1
for Cluster Interconnect
Crossover
Cable
Dual-port
Ethernet
Adapters (2)
Dual-port
Ethernet
Adapters (2)
Crossover
Cable
Figure 2-14.
Redundant Ethernet cluster interconnect for a two-node
PDC/O1000 cluster
These components include two dual-port Ethernet adapters in each cluster
node. The top port on each adapter connects by Ethernet cable to one of two
Ethernet switches or hubs provided for the cluster interconnect. The bottom
port on each adapter connects by Ethernet cable to the client LAN for the
cluster. A crossover cable is installed between the two Ethernet switches or
hubs used in the Ethernet cluster interconnect.