H3C Technologies H3C S10500 Series Switches - Manual (Page 21)

Configuring IRF member switches in IRF mode
Specifying an IRF domain ID for an IRF fabric
Introduction to IRF domains
IRF uses IRF domain IDs to uniquely identify IRF fabrics. IRF domain IDs prevent IRF fabrics from
interfering with one another.
See
Figure 8 , Switch A and Switch B form IRF fabric 1, and Switch C and Switch D form IRF fabric 2. The
IRF 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 8 A network that comprises two IRF domains
Assigning a domain ID to an IRF fabric
Follow these steps to assign a domain ID to an IRF fabric:
To do… Use the command… Remarks
Enter system view system-view —
Assign a domain ID to the IRF
fabric
irf domain domain-id
By default, the domain ID of an
IRF fabric is 0.
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