IRF physical interface requirements

When you select IRF physical interfaces, follow these restrictions and guidelines:

• You can use physical interfaces from the modules in Table 2 for IRF links on a member device.

  Table 2: Candidate IRF physical interfaces

  Module	Candidate IRF physical interfaces
  SAP-4EXP(JG366A)	The four 10GBASE-R/W ports.
  FIP-240(JH137A)	The two GE ports.
  FIP-300(JG671A)	The 12 GE ports.
  FIP-310(JG672A)	The four GE ports and the two 10GBASE-R/W ports.
  SAP-20GE2XP(JH139A)	The four GE ports with the highest port numbers and the two 10GBASE-R/W ports.
  SAP-28GE(JH138A)	The 12 GE ports with the highest port numbers.

• If you use ports on the SAP-4EXP(JG366A) module for IRF links on one device, you cannot use ports on other modules as IRF physical interfaces on the neighboring member device. If you do not use ports on the SAP-4EXP(JG366A) module for IRF links on one device, you cannot use ports on the SAP-4EXP(JG366A) module as IRF physical interfaces on the neighboring member device.

• If the device contains a FIP-600(JG360A) module, you can use only the physical interfaces on the SAP-4EXP(JG366A) module for IRF links.

• All IRF physical interfaces bound to an IRF port must belong to the same service module and operate at the same rate. The two ends of an IRF link must also operate at the same rate.

When you select transceiver modules and cables, follow these restrictions and guidelines:

• Use straight-through or crossover copper Ethernet cables to connect copper Ethernet ports for a short-distance connection.

• Use DAC cables to connect fiber Ethernet ports for a short-distance connection.

• Use transceiver modules and fibers to connect fiber Ethernet ports for a long-distance connection.

• The transceiver modules at the two ends of an IRF link must be the same type. For more information about transceiver modules, see the device installation guide.