Symantec Veritas Cluster Server Installation Manual page 41

Private network setup with crossed links
Figure 3-3
Public network
Crossed link
To set up the private network
1 Install the required network interface cards (NICs).
Create aggregated interfaces if you want to use these to set up private network.
2 Connect the VCS private NICs on each system.
3 Use crossover Ethernet cables, switches, or independent hubs for each VCS
communication network. Note that the crossover Ethernet cables are
supported only on two systems.
Ensure that you meet the following requirements:
The power to the switches or hubs must come from separate sources.
On each system, you must use two independent network cards to provide
redundancy.
The network interface card to set up private interface is not part of any
aggregated interface.
During the process of setting up heartbeat connections, consider a case where
a failure removes all communications between the systems.
Note that a chance for data corruption exists under the following conditions:
The systems still run, and
Private networks
Preparing to install VCS
Performing preinstallation tasks
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