H3C Technologies H3C SecPath F5020 - Manual (Page 14)

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• After you assign a distributed device with a member ID of 2 to an IRF fabric, the name of the
interface GigabitEthernet 3/0/1 changes to GigabitEthernet 2/3/0/1. The file path of
slot1#flash:/test.cfg changes to chassis2#slot1#flash:/test.cfg.
MPU roles
MPU roles are available only for distributed devices.
Each IRF member device has one or two MPUs. The following are roles that the MPUs play:
Role Description
Master MPU
Active MPU of the master device. It is also called the global active MPU. You
configure and manage the entire IRF fabric at the CLI of the global active MPU.
Active MPU
Active MPU on each member device. An active MPU has the following
responsibilities:
• Manages the local device, including synchronizing configuration with the
local standby MPU, processing protocol packets, and creating and
maintaining route entries.
• Processes IRF-related events, such as master election and topology collection.
Standby MPU
For the master MPU, all other MPUs are standby MPUs, including active MPUs
on subordinate devices.
If a member device has two MPUs, the MPU backing up the local active MPU is
the local standby MPU from the perspective of the member device.
IRF port
An IRF port is a logical interface that connects IRF member devices. Every IRF-capable device has two IRF
ports. The IRF ports are named IRF-port n/1 and IRF-port n/2, where n is the member ID of the device.
The two IRF ports are referred to as IRF-port 1 and IRF-port 2 in this book.
For centralized IRF devices, the IRF ports are named IRF-port n/1 and IRF-port n/2, where n is the
member ID of the device.
For distributed IRF devices:
• In standalone mode, the IRF ports are named IRF-port 1 and IRF-port 2.
• In IRF mode, the IRF ports are named IRF-port n/1 and IRF-port n/2, where n is the member ID of
the device.
The two IRF ports are referred to as IRF-port 1 and IRF-port 2 in this book.
To use an IRF port, you must bind a minimum of one physical interface to it. The physical interfaces
assigned to an IRF port form an aggregate IRF link automatically. An IRF port goes down when all its IRF
physical interfaces are down.
IRF physical interface
IRF physical interfaces connect IRF member devices and must be bound to an IRF port. They forward
traffic between member devices, including IRF protocol packets and data packets that must travel across
IRF member devices.