HP ProLiant 4500 Compaq ProLiant Cluster HA/F100 and HA/F200 Administrator Gui - Page 49

Example 2, for cluster-to-LAN communication. The Compaq Advanced Network Control

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2-18 Compaq ProLiant Clusters HA/F100 and HA/F200 Administrator Guide Example 2 The second example configuration consists of three single-port NICs. One NIC is dedicated to intracluster communication. The other two NICs are used for cluster-to-LAN communication. The Compaq Advanced Network Control Utility is used to configure two of the NICs-one as the primary and one as the standby of a redundant pair. The interconnect is fully redundant when MSCS is configured to use the other network cards as backups for the interconnect. Failure of the primary interconnect path results in intracluster communications occurring over the primary NIC of the redundant pair. If the entire interconnect card fails, the cluster nodes will still have a working communication path. The cluster-to-LAN communication is fully redundant up to the network hub. With this configuration, even a failure of the primary NIC results only in the transfer of the network path to the standby NIC. Other than a failure of the network hub, any failure of any cluster network component will be resolved by the redundancy of this configuration. The primary disadvantage of this configuration as compared to Example 1 is that an additional card slot is used by the third NIC. Primary Interconnect Path Node 1 Node 2 Backup Cluster to LAN and Backup Interconnect Path Primary Cluster to LAN and Backup Interconnect Path Hub Clients Figure 2-9. Use of three NICs to increase redundancy

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2-18
Compaq ProLiant Clusters HA/F100 and HA/F200 Administrator Guide
Example 2
The second example configuration consists of three single-port NICs. One
NIC is dedicated to intracluster communication. The other two NICs are used
for cluster-to-LAN communication. The Compaq Advanced Network Control
Utility is used to configure two of the NICs—one as the primary and one as
the standby of a redundant pair.
The interconnect is fully redundant when MSCS is configured to use the other
network cards as backups for the interconnect. Failure of the primary
interconnect path results in intracluster communications occurring over the
primary NIC of the redundant pair. If the entire interconnect card fails, the
cluster nodes will still have a working communication path.
The cluster-to-LAN communication is fully redundant up to the network hub.
With this configuration, even a failure of the primary NIC results only in the
transfer of the network path to the standby NIC. Other than a failure of the
network hub, any failure of any cluster network component will be resolved by
the redundancy of this configuration.
The primary disadvantage of this configuration as compared to Example 1 is
that an additional card slot is used by the third NIC.
Clients
Hub
Node 1
Primary Interconnect Path
Primary Cluster to LAN and
Backup Interconnect Path
Backup Cluster to LAN and
Backup Interconnect Path
Node 2
Figure 2-9.
Use of three NICs to increase redundancy