HPE Nimble Storage HF Series Hardware Manual page 16

Figure 7: An example of Ethernet connections using interface pairs
1 Host/server
2 Switch 1/subnet 1
3 Switch 2/subnet 2
4 Array
The purpose of interface pairs is to ensure high availability and redundancy in the event of a controller or network switch
failure. In the event of a controller failover, proper network connections ensure minimal data service interruption.
An interface pair is the combination of the same data port on both controllers. In the preceding diagram:
Data ports eth3 form one interface pair (red)
Data ports eth4 form another interface pair (blue)
Make sure that each interface pair connects to the SAME network or subnet. In this example, the red interface pair connects
to subnet 1 and the blue connects to subnet 2.
To minimize single points of failure, connect as many interface port pairs as possible.
Fibre Channel Interface Pairs
A Fibre Channel interface pair refers to a set of two Fibre Channel data connections, one from each controller, to the Fibre
Channel switch. The cables for an interface pair connect to the same data port on each controller. See Interface Numbering
on page 17.
5 Interface pair from data ports eth3
6 Interface pair from data ports eth4
7 Data interface pair 1
8 Data interface pair 2
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