43
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 at least 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.
NOTE:
•
and
show the topologies of an IRF fabric made up of three S5120-52SC-HI switches
that use the SFP+ ports on the front panel for IRF connections.
•
The IRF port connections in the two figures are for illustration only, and more connection methods are
available.
For information about the physical ports available for IRF connections on the S5120-HI switches, see
"
Identifying physical IRF ports on the member switches
."
Figure 54
IRF fabric in daisy chain topology
IRF-port1
IRF-port2
IRF-port1
IRF-port2
1
2
3
1
2
3