H3C SR6600 Configuration Manual

Also see for SR6600 SPE-FWM: Configuration guide Configuration guide Command reference Command reference Command reference

Contents

H3C SR6600 Configuration Manual Manual pdf 12 page image

4By default, the standby MPU of a device is automatically assigned the same ID as the active MPU.MPU rolesEach IRF member device has one or two MPUs. The following are MPU roles:Role DescriptionMaster MPU Active MPU of the master device. It is also called the global active MPU. Youconfigure and manage the entire IRF fabric at the CLI of the global active MPU.Active MPUActive MPU on each member device. An active MPU performs the followingoperations:• Manages the local device, including synchronizing configuration with thelocal standby MPU, processing protocol packets, and creating andmaintaining route entries.• Processes IRF-related events, such as master election and topology collection.Standby MPUFor the master MPU, all other MPUs are standby MPUs, including active MPUson subordinate devices.If a member device has two MPUs, the MPU backing up the local active MPU isthe local standby MPU from the perspective of the member device.IRF portAn IRF port is a logical interface that connects IRF member devices. Every IRF-capable device has two IRFports.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 thedevice. 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 interfacesassigned to an IRF port automatically form an aggregate IRF link. An IRF port goes down when all its IRFphysical interfaces are down.IRF physical interfaceIRF physical interfaces connect IRF member devices and must be bound to an IRF port. They forwardtraffic between member devices, including IRF protocol packets and data packets that must travel acrossIRF member devices.For more information about physical interfaces that can be used for IRF links, see "IRF physical interfacerequirements."MADAn IRF link failure causes an IRF fabric to split in two IRF fabrics operating with the same Layer 3 settings,including the same IP address. To avoid IP address collision and network problems, IRF uses multi-activedetection (MAD) mechanisms to detect the presence of multiple identical IRF fabrics, handle collisions,and recover from faults.