4-45
and
show the topologies of an IRF fabric made up of three S5120V3-28S-EI
switches. The IRF port connections in the two figures are for illustration only, and more connection
methods are available.
Figure4-2 IRF fabric in daisy chain topology
Figure4-3 IRF fabric in ring topology
Identifying IRF physical ports on the member switches
Identify the physical IRF ports on the member switches according to your topology and connection
scheme.
shows the physical ports that can be used for IRF connection and the port use restrictions.
Table4-2 Candidate physical IRF ports and their use restrictions
Chassis
Candidate physical IRF ports
Use restrictions
S5120V3-28S-EI
S5120V3-54S-EI
S5120V3-28S-HPWR
-EI
S5120V3-54S-PWR-
EI
•
SFP+ ports on the front panel
•
10/100/1000BASE-T
autosensing Ethernet ports on
the front panel
•
All physical ports to be bound to an
IRF logical interface must have the
same data rate.
•
An SFP+ port can be used as an IRF
physical port only when it operates at
10 Gbps.
IRF-port1
IRF-port2
IRF-port1
IRF-port2
1
2
3
1
2
3
1
2
3
IRF-port1
IRF-port2
IRF-port1
IRF-port1
IRF-port2
IRF-port2
1
2
3