under the interface) area <area-id> authen tica tion message-digest(use under router ospf <process-id>) 例: interface ethernet 0 ip address0.10.10.10255.255.25.0 ip ospf message-digest-key 10 md5 mypassword router ospf 100 network 10.10.000.0.255 255 area 0 area 0 authentication message-digest 3. virtuallink (use for two purpose: a link an area that does not have a physical connection to the backbar b. patching the backbone in case discontinuity of area 0 occurs) area<area-id> virtual-link<RID>area-id是作为传输的area号,即做 virtua link的两个area之间的area,RID是做 virtual link的两个路由器的id,一般是路由 器上最大的 ip address或最大的 loopback地址) 例 路由器RTA地址为1.1.1.1在area1中,路由器RIB地址为2222在 area0中 area0和 areal通过area2做 virtual link RTA# outer ospf 100 area 2 virtual-link 2.2.2.2 RTB# router ospf 100 area 2 virtual-link l.L. .I 4. Adjacencies ip ospf hello-interval <seconds> ip ospf dead-interval <seconds> ip ospf priority <value>( value值缺省为1,设为0则该路由器不为DR、BDR) sh ip ospf interface <interface>, sh ip ospf neighbor y2 ilE neighbor <ip-address> Priority <number>l Ipoll-interval <seconds>(E 前已较少使用) 5. NBMA (1) point to point subinterface 在物理口上开若干逻辑口实现点对点互连 例:under the interface) area <area-id> authentication message-digest (use under "router ospf <process-id>) 例： interface ethernet 0 ip address 10.10.10.10 255.255.255.0 ip ospf message-digest-key 10 md5 mypassword router ospf 100 network 10.10.0.0 0.0.255.255 area 0 area 0 authentication message-digest 3. virtual link (use for two purpose : a. link an area that does not have a physical connection to the backbone b. patching the backbone in case discontinuity of area 0 occurs) area <area-id> virtual-link <RID> (area-id 是作为传输的 area 号，即做 virtual link 的两个 area 之间的 area, RID 是做 virtual link 的两个路由器的 id ,一般是路由 器上最大的 ip address 或最大的 loopback 地址） 例: 路由器 RTA 地址为 1.1.1.1 在 area 1 中, 路由器 RTB 地址为 2.2.2.2 在 area 0 中, area0 和 area1 通过 area 2 做 virtual link. RTA# router ospf 100 area 2 virtual-link 2.2.2.2 RTB# router ospf 100 area 2 virtual-link 1.1.1.1 4. Adjacencies: ip ospf hello-interval <seconds> ip ospf dead-interval <seconds> ip ospf priority <value> (value 值缺省为 1，设为 0 则该路由器不为 DR、BDR) sh ip ospf interface <interface>, sh ip ospf neighbor 验证 neighbor <ip-address> [priority <number>] [poll-interval <seconds>] (目 前已较少使用) 5. NBMA: (1) point to point subinterface 在物理口上开若干逻辑口实现点对点互连 例: