4-38 
Device model 
Candidate IRF physical 
ports 
Restrictions for using the ports for 
IRF connections 
To bind multiple ports to an IRF port, make 
sure the ports are in the same group. Ports in 
one group can be bound to different IRF ports. 
Other S5130S-EI switch 
models 
All the following ports on the 
front panel: 
•  10/100/1000BASE-T 
autosensing ports 
•  SFP ports 
The port must operate at 1 Gbps. 
For a 52-port switch model, the 52 ports are 
divided into two groups: ports 1 to 24, port 51, 
and port 52 in one group and ports 25 to 50 in 
the other group. 
To bind multiple ports to an IRF port, make 
sure the ports are in the same group. Ports in 
one group can be bound to different IRF ports. 
 
Planning the cabling scheme 
Use the following cables to connect the IRF physical ports on the switches: 
  10/100/1000BASE-T autosensing Ethernet port—Category 5 or above twisted-pair cable. 
  5G/2.5G/1000BASE-T autosensing Ethernet port—Category 5e or above twisted-pair cable. 
  2.5G/1000/100BASE-T autosensing Ethernet port—Category 5e or above twisted-pair 
cable. 
  10/5/2.5/1GBASE-T autosensing Ethernet port—Category 6 or above twisted-pair cable. 
  SFP port—GE SFP fiber transceiver module and optical fiber, GE SFP copper transceiver 
module and twisted pair cable or GE SFP cable. For the available transceiver models and 
cables, see ports in Hardware Information and Specifications. 
  SFP+ port—SFP+ fiber transceiver module and optical fiber or SFP+ cable. For the available 
transceiver models and cables, see ports in Hardware Information and Specifications. 
If the IRF member switches are far away from one another, use SFP/SFP+ transceiver modules and 
optical fibers. If the IRF member switches are all in one equipment room, use twisted pair cables or 
SFP/SFP+ cables. 
As a best practice,  use ring topology to connect the switches. The following describes  cabling 
schemes in ring topology. 
Connecting the IRF member switches in one rack 
Use SFP cables to connect the IRF member switches in a rack as shown in Figure4-4. The switches 
in the ring topology (see Figure4-5) are in the same order as connected in the rack. 
Figure4-4 Connecting the switches in one rack