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8–Configuring FCoE in a Linux Environment
Boot-from-SAN
FE0254601-00 A 8-33
Figure 8-12. Single-Path Topology
Multipath Topology
The multipath topology provides fault tolerance through redundant SAN
components: two adapter ports, two converged networking switches, and access
to the boot LUNs through two independent storage array controllers. Figure 8-13
shows the SAN components and their connections. The server has access to the
primary and alternate boot LUNs through two independent paths. A single point of
failure is unlikely with this configuration. You can enhance this configuration
further by adding more adapter ports that connect to the converged networking
switches. This added level of redundancy protects against adapter board failures.
Server
Adapter Port 1
Converged
Networking Switch
Controller A
Storage Array
LUN 1 Primary Boot Device
LUN 2 Alternate Boot Device
LUN 3 Alternate Boot Device
LUN 4 Alternate Boot Device