H3C Technologies H3C SecPath F5020 - Manual (Page 12)

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Figure 2 Two-chassis IRF fabric implementation schematic diagram
Single point of management
An IRF fabric is accessible at a single IP address on the network. You can use this IP address to log in
through any network port to manage all the devices in the fabric.
For an SNMP NMS, an IRF fabric is one managed network node.
Node redundancy
In an IRF fabric, one member works as the master to manage and control the entire IRF system. All the
other members process services while backing up the master. When the master fails, all the other
member devices elect a new master from among them to take over without interrupting services.
Link redundancy
IRF link aggregation
You can use multiple physical links to connect two IRF member devices. IRF automatically aggregates the
physical links for redundancy and load balancing.
On distributed devices, the IRF links in an aggregation can be located on different cards.
IRF link
An IRF
fabric is
formed.
Master
(Member ID=1)
Subordinate
(Member ID=2)
Active MPU
Device A
(Member ID=1)
Device B
(Member ID=2)
IRF physical
interfaces
IRF physical
interfaces
IRF-port 2 IRF-port 1
Network
interfaces
Network
interfaces
IRF
Standby MPU
Active MPU
Standby MPU
IRF’s master MPU
IRF’s standby MPU
IRF’s standby MPU
IRF’s standby MPU