H3C Technologies H3C SecPath F5020 - Manual (Page 24)

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Figure 10 ND MAD scenario
Each IRF member device compares the domain ID and the active ID in incoming NS packets with its
domain ID and active ID:
• If the domain IDs are different, the NS packet is from a different IRF fabric. The device does not
continue to process the packet with the MAD mechanism.
• If the domain IDs are the same, the device compares the active IDs:
{
If the active IDs are different, the IRF fabric has split.
{
If the active IDs are the same, the IRF fabric is integrated.
Device
Master Subordinate
IRF
Internet
Customer
premise
network
IRF link
Common traffic path
Extended ND traffic path
STP domain (all devices
must run the spanning
tree feature)