Nokia IPSO 4.0 Reference Manual page 211

192.168.3.10 is the cluster IP address of the primary cluster interface.
192.168.4.10 is the cluster IP address of the secondary cluster interface.
Cluster MAC address: A MAC address that the cluster protocol installs on all nodes. Only the
cluster master responds to ARP requests that routers send to cluster IP addresses. The cluster
MAC address makes the cluster appear as a single device at the OSI layer two level.
Cluster master: The master node plays a central role in balancing the traffic among the cluster
nodes.The cluster determines which node is the master according to the following criteria.
In forwarding mode the master receives all the incoming packets and may forward them to
the other nodes for processing.
In this mode the master is the active node with the highest performance rating. If
performance ratings are equal on all nodes, the master is the first node of the cluster.
In the multicast modes, all the nodes receive all the incoming packets. The master
determines which nodes should process each packet and provides that information to the
other nodes. Nodes simply drop packets that they should not process.
In these modes, the master is the node that joins the cluster first.
Note
See "Clustering Modes"
Cluster member: A cluster node that is not the master.
Cluster node: Any system that is part of a cluster, regardless of whether it is a member or the
master.
Cluster protocol networks/interfaces: The cluster protocol networks are used for cluster
synchronization and cluster management traffic. You create these networks by connecting
cluster protocol interfaces. You must create a primary cluster protocol network, and Nokia
recommends that you also create a secondary cluster protocol network for redundancy.
You specify which interfaces are cluster protocol interfaces by selecting from the configured
Ethernet interfaces. (Only Ethernet interfaces can participate in a cluster.)
The cluster protocol interfaces can also be used for NGX synchronization traffic. For more
information about how to configure NGX for clustering, see
The following list explains more about primary and secondary cluster interfaces:
Primary cluster protocol network/interface: Each node must be connected to the primary
cluster protocol network. The interface a node uses to connect to this network is its primary
cluster protocol interface. In the example cluster, the primary interface is eth-s3p1.
If the primary interface fails on a node and you have not configured a secondary network,
the node is removed from the cluster. If it is the master, one of the remaining nodes becomes
the new master.
These interfaces should be internal, and Nokia also recommends that you use a dedicated
network for the primary cluster protocol network. The ideal configuration is to physically
separate the primary cluster protocol networks from the production networks (connect them
Nokia Network Voyager for IPSO 4.0 Reference Guide
for more information about this feature.
"Configuring NGX for Clustering."
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