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Planning IRF topology and connections
You can create an IRF fabric in daisy chain topology, or more reliably, ring topology. In ring topology,
the failure of one IRF link does not cause the IRF fabric to split as in daisy chain topology. Rather, 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.
The S5820V2-52QF, S5820V2-52QF-U, and S5820V2-54QS-GE switches can provide 10-GE and
40-GE IRF connections through SFP+ ports and QSFP+ ports, respectively. You can bind several
SFP+ or QSFP+ ports to an IRF port for increased bandwidth and availability.
The S5820V2-52Q switch can provide 10-GE and 40-GE IRF connections through 1/10-GE Ethernet
ports or QSFP+ ports. You can bind several 1/10-GE Ethernet ports or QSFP+ ports to an IRF port
for increased bandwidth and availability.
The S5830V2-24S and S5820V2-48S switches can provide 10-GE IRF connections through SFP+
ports. You can bind several SFP+ ports to an IRF port for increased bandwidth and availability.
Figure 28 an
d Figure 29 show the topologies of an IRF fabric made up of three S5820V2-52QF
switches that use SFP+ ports for IRF connections.
The IRF port connections in the two figures are for illustration only, and more connection methods
are available.
Figure 28 IRF fabric in daisy chain topology
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