1、手工写静态路由NULL0~~ip route 192.168.8.0 255.255.252.0 null 0
Network 汇总路由~~network 192.168.8.0 mask 255.255.252.0
2、Network 明细
1)宣告明细路由
2)aggregate-address x.x.x.0 255.255.252.0 summary-only/suppress-map name