Dell PS4100 Technical Information download pdf (Page 20)

June 2012 Dell EqualLogic Configuration Guide v13.2 14

Figure 8 4110/6110 Vertical Port Failover

With the PS4110/PS6110 family of controllers, vertical port failover can ensure continuous full

bandwidth is available from the array even if you have a link or switch failure. This is accomplished by

combining 10GbE “eth0” ports in each controller into a single logical port from the point of view of the

active controller. In a fully redundant SAN configuration, you must configure the connection as shown

in Figure 9.

In a redundant switch SAN configuration, to optimize the system response in the event you have a

vertical port failover you must connect either the SFP+ cable or the 10GbaseT cable from each

controller to a different switch in the SAN network. While it is a supported configuration, it is not

recommended to connect both the SFP+ and 10GbaseT ports on each controller at the same time. In

this scenario, the SFP+ port will always be the preferred active port and this preference cannot be

changed by the user. This preference is not guaranteed in future array firmware releases.

The connection paths illustrated in Figure 9 show how to connect the port connection paths between

the two controllers. Also note how IP addresses are assigned to the vertical port pair.

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Dell PS4100 Technical Information Page 20