OSPF命令集求助

chinacncom

11-3 neighbor ip-address database-filter all out

这条命令是干什么的？ 英文版的有一句话读不懂（红色字体），望大神帮我解释啊~

Purpose: To prevent the flooding of link-state advertisements (LSAs) to the indicated neighbor. Many Internet service providers (ISPs) employ redundant links between OSPF neighbors. When an OSPF router receives an LSA, the LSA is flooded on all OSPF inter-faces except for the interface on which the LSA was received. This command allows an ISP to choose between flooding overhead and flooding reliability. For example, if there are two links between OSPF neighbors, this command can be used to prevent the flooding of LSAs on one of the links. This command can be used only on a multipoint interface or an NBMA interface.