March 2013 Dell EqualLogic Configuration Guide v14.1 1-13
Figure 4 PS4100 vertical port failover
Figure 5 PS6100 vertical port failover
With PS4100/PS6100 family 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
corresponding physical ports in each controller (vertical pairs) into a single logical port from the point
of view of the active controller. In a fully redundant SAN configuration, you must configure the
connections as shown in Figure 24 and Figure 25 in section 7.3.4.
In a redundant switch SAN configuration, to optimize the system response in the event you have a
vertical port failover you must split the vertical port pair connections between both SAN switches.
The connection paths illustrated in Figure 6 and Figure 7 show how to alternate the port connection
paths between the two controllers. Also note how IP addresses are assigned to vertical port pairs.
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