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You can affect the election result by assigning a high member priority to the intended master switch.
For more information about master election, see HPE FlexFabric 5901 Switch Series IRF
Configuration Guide.
Prepare an IRF member ID assignment scheme. An IRF fabric uses member IDs to uniquely identify
and manage its members, and you must assign each IRF member switch a unique member ID.
Planning IRF topology and connections
You can create an IRF fabric in daisy chain topology or more reliable ring topology. In ring topology,
the failure of one IRF link does not cause the IRF fabric to split as in daisy chain topology. Instead,
the IRF fabric changes to a daisy chain topology without interrupting network services.
You connect the IRF member switches through IRF ports, the logical interfaces for the connections
between IRF member switches. Each IRF member switch has two IRF ports: IRF-port 1 and IRF-port
2. To use an IRF port, you must bind a minimum of one physical port to it.
When connecting two neighboring IRF member switches, you must connect the physical ports of
IRF-port 1 on one switch to the physical ports of IRF-port 2 on the other switch.
As a best practice to avoid loop topology, first complete IRF configuration and then connect the IRF
member switches.
The HPE 5901AF 48G 4XG 2QSFP+ switches can provide 10-GE/40-GE IRF connections through
SFP+ ports/QSFP+ ports, and you can bind several SFP+ ports/QSFP+ ports to an IRF port for
increased bandwidth and availability.
Figure 23 and Figure 24 show the topologies of an IRF fabric made up of three switches. The IRF
port connections in the two figures are for illustration only, and more connection methods are
available.
Figure 23 IRF fabric in daisy chain topology
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