Configure the physical connection mode
IRF supports two physical connection modes: daisy chain connection and ring connection.
A ring connection is more reliable than a daisy chain connection. The failure of one link in a ring connection does not affect the function and performance of the IRF, whereas the failure of one link in a daisy chain connection causes the split of the IRF.
Figure 3-25 The daisy chain connection mode
Master 
Slave
IRF
Slave
Figure 3-26 The ring connection mode
Each of the devices comprising a ring connection or non-edge devices in a daisy chain connection needs two 10 GE ports to connect other devices; therefore, you need to install two 1-port 10 GE XFP interface modules on such devices.
Connect the cables
Before connecting the cables, determine the actual position of the member devices and the length of the cables, and observe the following:
z
z
z
Understand the neighbor devices for one another
Install the interface modules in proper slots as needed. Each Switch 4210G provides two expansion slots.
Determine the ports on different devices to be connected.
Note that:
