Physical Irf Port; Irf Domain Id; Irf Split - H3C S5120-EI Series Configuration Manual

For two neighboring devices, their IRF physical links must be bound to IRF-port 1 on one device and to
IRF-port 2 on the other.

Physical IRF port

Physical IRF ports connect IRF member devices and must be bound to an IRF port. They forward IRF
protocol packets between IRF member devices and data packets that must travel across IRF member
devices.
For more information about physical ports that can be used for IRF links, see
configuration

IRF domain ID

One IRF fabric forms one IRF domain. IRF uses IRF domain IDs to uniquely identify IRF fabrics and prevent
IRF fabrics from interfering with one another.
As shown in
2. The fabrics have LACP MAD detection links between them. When a member switch in one IRF fabric
receives an extended LACP packet for MAD detection, it looks at the domain ID in the packet to see
whether the packet is from the local IRF fabric or from a different IRF fabric. Then, the switch can handle
the packet correctly.
Figure 2 A network that comprises two IRF domains

IRF split

IRF split occurs when an IRF fabric breaks up into two or more IRF fabrics because of IRF link failures, as
shown in Figure
guidelines."
Figure 2, Switch A and Switch B form IRF fabric 1, and Switch C and Switch D form IRF fabric
3. The split IRF fabrics operate with the same IP address and cause routing and
3
"General restrictions and