R3303-HP HSR6800 Routers IRF Configuration Guide

15
Connecting physical IRF ports
When you connect two neighboring IRF members, connect the physical ports of IRF-port 1 on one
member to the physical ports of IRF-port 2 on the other, as shown in Figure 9.
F
ollow these guidelines when selecting transceiver modules and cables:
• Use SFP+ transceiver modules and fibers for long-distance connection.
• When you connect SFP+ ports, connect the transmit port of an SFP+ transceiver module at one end
to the receive port of an SFP+ transceiver module at the other end.
• 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.
IMPORTANT:
No intermediate devices are allowed between neighboring members.
Figure 9 Connecting IRF physical ports
Connect the devices into a daisy chain topology or a ring topology. A ring topology is more reliable
(see Figure 10)
. In ring topology, the failure of one IRF link does not cause the IRF fabric to split as in daisy
chain topology. Instead, the IRF fabric changes to a daisy chain topology without interrupting network
services.
To use the ring topology, you must have at least three member devices.
Figure 10 Daisy chain topology versus ring topology
IRF
Ring topology
Subordinate Subordinate
Master
IRF-Port1 IRF-Port2
IRF-Port1
IRF-Port2IRF-Port1
IRF-Port2
Daisy chain topology
IRF
Master
Subordinate
Subordinate
IRF-Port2
IRF-Port2
IRF-Port1
IRF-Port1