Hello

section 13.1 describe which LSA is newer

1- The LSA having the newer LS sequence number is more
recent.See Section 12.1.6 for an explanation of the LS
sequencenumber space. If both instances have the same
LS sequencenumber, then:

2- If the two instances have different LS checksums,
then the instance having the larger LS checksum (when
considered as a 16-bit unsigned integer) is considered
more recent.

3- Else, if only one of the instances has its LS age
field set to MaxAge, the instance of age MaxAge is
considered to be more recent.

4-Else, if the LS age fields of the two instances
differ by more than MaxAgeDiff, the instance having
the smaller (younger) LS age is considered to be more
recent.

5- Else, the two instances are considered to be
identical.
=========================

I )
when 2) could be true ( same instance and different
checksum ) and why in this case the larger checksum is
considered as newer

II)
when 4) could be true ( same instance and age differ
by more than MaxageDiff = 15 min ) and why in this
case only when the age differ more than this value,
the smaller age is considered as more recent

regards.

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