MIB: OSPF-MIB
The 32-bit sum of the checksums of the LSAs contained in this area's link state database.
This sum excludes external (LS type-5) link state advertisements. The sum can be used to determine if there has
been a change in a router's link state database, and to compare the link state database of two routers.
The value should be treated as unsigned when comparing two sums of checksums.