H3c-technologies H3C SecPath F5020 Instrukcja Użytkownika Pobierz pdf (Strona 16)

IRF split

IRF split occurs when an IRF fabric breaks up into multiple IRF fabrics because of IRF link failures, as

shown in Figure 4. T

he split IRF fabrics operate with the same IP address. This situation causes routing

and forwarding problems on the network. To quickly detect a multi-active collision, configure BFD MAD.

To quickly detect a multi-active collision, configure a minimum of one MAD mechanism.

Figure 4 IRF split

IRF merge

IRF merge occurs when two split IRF fabrics reunite or when two independent IRF fabrics are united, as

shown in Figure 5.

Figure 5 IRF merge

Member priority

Member priority determines the possibility of a member device to be elected the master. A member with

higher priority is more likely to be elected the master.

Master election

Master election is held each time the IRF fabric topology changes in the following situations:

• The IRF fabric is established.

• The master device fails or is removed.

• The IRF fabric splits.

• Independent IRF fabrics merge.

NOTE:

Master election does not occur when two split IRF fabrics merge.

Master election uses the following rules in descending order:

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 81 82

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H3c-technologies H3C SecPath F5020 Instrukcja Użytkownika Strona 16