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As a best practice to avoid loop topology, first complete IRF configuration and then connect the IRF
member switches.
The S5850 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.
Figure4-2
and
port connections in the two figures are for illustration only, and more connection methods are
available.
Figure4-2 IRF fabric in daisy chain topology
1
2
3
Figure4-3 IRF fabric in ring topology
1
2
3
Identifying physical IRF ports on the member switches
Identify the physical IRF ports on the member switches according to your topology and connection
scheme.
Only the SFP+ ports and QSFP+ ports on the switch can be used for IRF connections. The 10G ports
split from a QSFP+ port can also be used for IRF connections.
Figure4-3
show the topologies of an IRF fabric made up of three switches. The IRF
IRF-port1
IRF-port2
1
IRF-port1
1
IRF-port2
IRF-port1
3
IRF-port1
IRF-port2
2
3
IRF-port2
IRF-port1
IRF-port2
2
4-3
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