Designing Disaster Tolerant High Availability Clusters, 10th Edition, March 2003 (B7660-90013)

Disaster Tolerance and Recovery in an MC/ServiceGuard Cluster
Disaster Tolerant Architecture Guidelines
Chapter 138
they use physically different routes for each network as indicated in
Figure 1-10. How you route cables will depend on the networking
technology you use. Specific guidelines for some network technologies
are listed here.