CISCO OSPF与BGP配置分析

Question

求牛人详细解释下列各条命令的含义
router ospf 110
log-adjacency-changes
redistribute connected
redistribute static subnets
redistribute bgp 65534
network 10.189.2.40 0.0.0.7 area 0
network 10.189.34.0 0.0.0.255 area 0
network 10.189.35.0 0.0.0.255 area 0
network 10.189.36.0 0.0.0.255 area 0
network 10.189.45.0 0.0.0.255 area 0
network 10.189.61.0 0.0.0.255 area 0
network 10.189.62.0 0.0.0.63 area 0
default-information originate
!
router bgp 65534
no synchronization
bgp log-neighbor-changes
bgp dampening
redistribute connected
redistribute static
redistribute ospf 110
neighbor DCN peer-group
neighbor 10.189.45.193 remote-as 65535
neighbor 10.189.45.194 remote-as 65535
neighbor 10.189.45.195 remote-as 65535
no auto-summary

Answer 1

router ospf 110 //OSPF 100进程
log-adjacency-changes //邻接关系变化时产生通知
redistribute connected //重分发直连路由
redistribute static subnets //重分发静态路由
redistribute bgp 65534 //重分发bgp 65534的路由到OSPF路由表
network 10.189.2.40 0.0.0.7 area 0 宣告10.189.2.40/29 划入区域0
network 10.189.34.0 0.0.0.255 area 0
network 10.189.35.0 0.0.0.255 area 0
network 10.189.36.0 0.0.0.255 area 0
network 10.189.45.0 0.0.0.255 area 0
network 10.189.61.0 0.0.0.255 area 0
network 10.189.62.0 0.0.0.63 area 0
default-information originate \\ASBR向OSPF内宣告缺省路由，作用类似于宣告自己是网关，其他路由器的路由表中没有的路由表都转发给这台路由器
!
router bgp 65534 \\bgp 65534
no synchronization \\不同步日志
bgp log-neighbor-changes
bgp dampening \\使用来抑制一些频繁浮动路由的，每当某条路由浮动一次，它的惩罚值就会加1000，当超过抑制阀值时就被抑制，用来防止路由表震荡
redistribute connected \\重分直连路由
redistribute static \\重分静态路由
redistribute ospf 110 \\重分发OSPF110进程的路由到BGP中
neighbor DCN peer-group \\为对等体指定一个名字DCN，这里应该是命名bgp65535
neighbor 10.189.45.193 remote-as 65535 \\对邻居的10.189.45.193建立TCP会话，必须可达，AS号用来确认是EBGP还是IBGP,这里AS都一样是IBGP
neighbor 10.189.45.194 remote-as 65535
neighbor 10.189.45.195 remote-as 65535
no auto-summary \\禁用自动汇总