Q-Logic 8100 SERIES manual Multipath Topology

7–Configuring FCoE in a Windows Environment Boot from SAN

Multipath Topology

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 7-7shows 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 to 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

CNA Port 1 CNA Port 2

Converged	Converged
Networking	Networking
Switch 1	Switch 2

Controller A Controller B

Storage Array

LUN 1 (Primary Boot Device)

LUN 2 (Alternate Boot Device)

LUN 3 (Alternate Boot Device)

LUN 4 (Alternate Boot Device)

Figure 7-7. Multipath Topology

FE0254601-00 A 7-19