聚合的主要命令
aggregate-address addr mask
aggregate-address addr mask as-set
聚合同时保留AS
aggregate-address addr mask as-set advertise-map route-map-name
聚合同时保留相应的AS
aggregate-address addr mask attribute-map att-name
聚合同时可以修改其属性
aggregate-address addr mask route-map route-map-name
aggregate-address addr mask summary-only
在无明确聚合路径时时仍可进行聚合，一般是防止聚合的网段出现网络崩溃
aggregate-address addr mask suppress-map route-map-name
有选择性的聚合
