What is the flooding scope of an OSPFv3 LSA, if the value of the S2 bit is set to 1 and the S1 bit is set to 0?

Question

Exhibit

Options

• Alink local
• Barea wide
• CAS wide
• Dreserved

• A
  9% (3)
• B
  3% (1)
• C
  82% (28)
• D
  6% (2)

Explanation

The Type 1 router LSA is now link local and the Type 2 Network LSA is AS Wide S2 and S1 indicate the LSA's flooding scope. Table 9-1 shows the possible values of these two bits and the associated flooding scopes. Table 9-1 S bits in the OSPFv3 LSA Link State Type field and their associated flooding scopes LSA Function Code, the last 13 bits of the LS Type field, corresponds to the OSPFv2 Type field. Table 9-2 shows the common LSA types used by OSPFv3 and the values of their corresponding LS Types. If you decode the hex values, you will see that the default U bit of all of them is 0. The S bits of all LSAs except two indicate area scope. Of the remaining two, AS External LSAs have an AS flooding scope and Link LSAs have a linklocal flooding scope. Most of the OSPFv3 LSAs have functional counterparts in OSPFv2; these OSPFv2 LSAs and their types are also shown in Table 9-2. Table 9-2 OSPFv3 LSA types and their OSPFv2 counterparts

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