H3C S5120-EI Series, Руководство по эксплуатации

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1-3
Typically, an Ethernet interface or optical port forwards service packets to the network. When bound to
an IRF port, it acts as a physical IRF port and forwards packets among member devices. Packets that
can be forwarded include IRF-related negotiation packets, and service packets that need to be
forwarded cross-device.
For the detailed information of physical IRF port on S5120-EI series switches, see
Pysical IRF port .
IRF merge
As shown in Figure 1-2 , two IRFs operate independently and steadily. You can connect them physically
and perform necessary configurations to make them form one IRF, and this process is IRF merge.
Figure 1-2
IRF merge
IRF split
As shown in Figure 1-3 , after an IRF is formed, the failure of the IRF link causes physical disconnection
between two devices, and then the IRF becomes two IRFs. This process is IRF split.
Figure 1-3
IRF split
Member priority
Member priority decides the role of the member device during a role election process. A member with a
higher priority is more likely to be a master. The priority of a device defaults to 1. You can modify the
priority through command lines.
IRF Working Process
The life cycle of an IRF involves four stages: IRF Connections , Topology Collection , Role Election , and
IRF Management .
IRF Connections
Pysical IRF port
To make an IRF operate normally, you need to connect the IRF members physically. Physical ports that
are dedicated to IRF connection on devices are called physical IRF ports. For the S5120-EI series, the
10 GE interface modules can be inserted into the expansion module slots on the rear panel of the switch
to provide physical IRF ports. The following 10 GE interface modules can be used to provide physical
IRF ports: