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1、路由重发布概述路由重发布概述What is redistribute?对重发布的考虑 Routing feedback Suboptimal path selection Incompatible routing information Inconsistent convergence timeSeed MetricThe first, or seed metric for a route is derived from being directly connected to a router interface. Use the default-metric command to estab
2、lish the seed metric for the route or specify the metric when redistributing. Once a compatible metric is established, the metric will increment just like any other route.Default Seed Metrics重发布命令RtrA(config-router)# redistribute ? bgp Border Gateway Protocol (BGP) connected Connected egp Exterior G
3、ateway Protocol (EGP) eigrp Enhanced Interior Gateway Routing Protocol (EIGRP) igrp Interior Gateway Routing Protocol (IGRP) isis ISO IS-IS iso-igrp IGRP for OSI networks mobile Mobile routes odr On Demand stub Routes ospf Open Shortest Path First (OSPF) rip Routing Information Protocol (RIP) static
4、 Static routes将Classless路由协议 重发布到Classful路由协议实验：Classless to Classful172.16.12.1/24 S1S1S0S0 LondonDenver172.16.1.1/24172.16.3.1/30172.16.10.1/24loopback0loopback1loopback0172.16.2.1/27loopback2172.16.12.2/24172.16.11.2/24172.16.11.1/24IGRP 50OSPF Area 0Denver能学到哪些路由？Florence实验：Classless to Classful
5、 答案Florence(config)# router ospf 1 Florence(config-router)# network 172.16.12.0 0.0.0.255 area 0 Florence(config-router)# redistribute igrp 50 subnets Florence(config-router)# area 0 range 172.16.2.0 255.255.255.0 Florence(config-router)# area 0 range 172.16.3.0 255.255.255.0 Florence(config-router)
6、# exitFlorence(config)# router igrp 50 Florence(config-router)# network 172.16.0.0 Florence(config-router)# passive-interface serial 1 Florence(config-router)# redistribute ospf 1 metric 10000 100 1 255 1500 Florence(config-router)# exitFlorence(config)# ip route 172.16.2.0 255.255.255.0 null0 Flore
7、nce(config)# ip route 172.16.3.0 255.255.255.0 null0修改Distance解决 路由重发布的问题实验 DistanceR5R1 S1192.168.1.1/2410.5.1.2/2410.5.1.1/2410.4.1.2/2410.4.1.1/2410.3.1.2/2410.3.1.1/2410.1.1.2/2410.2.1.2/2410.2.1.1/2410.1.1.1/24IGRP 100RIPR3R2R4S0.1S0.1S0S1S0.2S0.1S1S0.1S0.1实验 答案（R13部分配置）access-l 1 permit 192.16
8、8.1.0 0.0.0.255 router ripdistance 80 10.1.1.1 255.255.255.255 1路由过滤 distribute-list / route-map实验1 (route-map)10.1.1.1/30 S1S1S0S0 LondonDenver172.16.1.1/24 172.16.2.1/24 172.16.3.1/24 172.16.4.1/24 172.16.5.1/24 172.16.6.1/24 172.16.7.1/24 172.16.8.1/24Loopback0-7Loopback0-7 10.1.1.2/3010.1.1.6/30
9、10.1.1.5/30ISIS Area 1OSPF Area 0Florence192.168.1.1/24 192.168.2.1/24 192.168.3.1/24 192.168.4.1/24 192.168.5.1/24 192.168.6.1/24 192.168.7.1/24 192.168.8.1/24 London想看到 192.168.1.0、192.168.3.0、192.168.5.0、192.168.7.0 Denver不想看到 172.16.2.0、172.16.4.0、172.16.6.0、172.16.8.0实验1 配置示例router ospf 9redist
10、ribute isis level-1 subnets route-map isis-ospf ! router isis redistribute ospf 9 route-map ospf-isis ! access-list 1 permit 192.168.1.0 0.0.0.255 access-list 1 permit 192.168.3.0 0.0.0.255 access-list 1 permit 192.168.5.0 0.0.0.255 access-list 1 permit 192.168.7.0 0.0.0.255 ! access-list 2 permit 1
11、72.16.2.0 0.0.0.255 access-list 2 permit 172.16.4.0 0.0.0.255 access-list 2 permit 172.16.6.0 0.0.0.255 access-list 2 permit 172.16.8.0 0.0.0.255 ! route-map isis-ospf permit 10match ip address 1 ! route-map ospf-isis deny 10match ip address 2 route-map ospf-isis permit 20实验2 (distribute-list)10.1.1
12、.1/30 S1S1S0S0 LondonDenver172.16.1.1/24 172.16.2.1/24 172.16.3.1/24 172.16.4.1/24 172.16.5.1/24 172.16.6.1/24 172.16.7.1/24 172.16.8.1/24Loopback0-7Loopback0-7 10.1.1.2/3010.1.1.6/3010.1.1.5/30EIGRP 50OSPF Area 0Florence192.168.1.1/24 192.168.2.1/24 192.168.3.1/24 192.168.4.1/24 192.168.5.1/24 192.
13、168.6.1/24 192.168.7.1/24 192.168.8.1/24 London想看到 192.168.1.0、192.168.3.0、192.168.5.0、192.168.7.0 Denver不想看到 172.16.2.0、172.16.4.0、172.16.6.0、172.16.8.0实验2 配置示例router eigrp 50redistribute ospf 9 metric 10000 100 1 255 1500distribute-list 12 out ospf 9 ! router ospf 9redistribute eigrp 50 subnetsdis
14、tribute-list 11 out eigrp 50 ! access-list 11 permit 192.168.1.0 0.0.0.255 access-list 11 permit 192.168.3.0 0.0.0.255 access-list 11 permit 192.168.5.0 0.0.0.255 access-list 11 permit 192.168.7.0 0.0.0.255 ! access-list 12 deny 172.16.2.0 0.0.0.255 access-list 12 deny 172.16.4.0 0.0.0.255 access-li
15、st 12 deny 172.16.6.0 0.0.0.255 access-list 12 deny 172.16.8.0 0.0.0.255 access-list 12 permit any路由过滤应用 distribute-list / route-map实验 (route-summary / route-map / distribute-list)CiscoLondonDenverS1E0E0S0 S0S1192.168.3.33/27192.168.3.34/27 192.168.3.129/27192.168.3.130/27192.168.3.97/27 192.168.3.6
16、5/27 192.168.1.1/24192.168.3.161/27 192.168.3.193/27 192.168.2.1/24172.16.4.1/24172.16.4.2/24172.16.5.1/24 172.16.6.1/24 172.16.7.1/24OSPF Area 0EIGRP 20EIGRP 10Juniper实验 答案（Summary: Juniper部分配置 ）router ospf 1summary-address 192.168.3.128 255.255.255.128summary-address 172.16.4.0 255.255.252.0 ! interface Ethernet 0ip summary-address eigrp 10 172.16.4.0 255.255.252.0ip summary-address eigrp 10 192.168.3.0 2
