NLSR

NLSR supports three types of LSAs. Each type of LSAs has its own sequence number. Current implementation aggregates the three sequence numbers into one and uses it as the sequence number in ChronoSync.

Since ChronoSync allows an application to sync more than one name prefixes, and the three types of LSAs are independent from each other, we should use separate name prefix and sequence number for each LSA type, so that the sequence number can be easily interpreted.