在路由引入时应用路由策略
如下图所示,R2与R1之间运行OSPF协议,R2与R3之间运行ISIS协议,要求R2上将ISIS路由引入到OSPF网络中,OSPF路由引入到ISIS网络中,10.1.1.0/24优先级较低、10.1.2.0/24具有Tag标识;
接口IP地址配置:
[r1]int g0/0/0
[r1-GigabitEthernet0/0/0]ip address 12.1.1.1 24
配置OSPF协议:
[r1]ospf 100 router-id 1.1.1.1
[r1-ospf-100]area 0
[r1-ospf-100-area-0.0.0.0]network 1.1.1.0 0.0.0.255
[r1-ospf-100-area-0.0.0.0]network 12.1.1.0 0.0.0.255
[r2]ospf 100 router-id 2.2.2.2
[r2-ospf-100]area 0
[r2-ospf-100-area-0.0.0.0]network 12.1.1.0 0.0.0.255
配置ISIS协议:
[r2]isis 1
[r2-isis-1]is-level level-2
[r2-isis-1]network-entity 10.0000.0000.0001.00
[r2-isis-1]int g0/0/1
[r2-GigabitEthernet0/0/1]isis enable
[r3]isis 1
[r3-isis-1]is-level level-2
[r3-isis-1]network-entity 10.0000.0000.0002.00
[r3-isis-1]int g0/0/1
[r3-GigabitEthernet0/0/1]isis enable
配置路由引入:
[r2]isis 1
[r2-isis-1]import-route ospf
[r2]ospf 100
[r2-ospf-100]import-route isis
配置路由过滤列表:
[r2]acl number ?
INTEGER<2000-2999> Basic access-list(add to current using rules)
INTEGER<3000-3999> Advanced access-list(add to current using rules)
INTEGER<4000-4999> Specify a L2 acl group
[r2]acl number 2001
[r2-acl-basic-2001]rule 5 permit source 10.1.1.1 0.0.0.255
[r2]ip ip-prefix xxx index 5 permit 10.1.2.1 24
[r2]route-policy isis2ospf permit node 1
[r2-route-policy]if-match ip-prefix xxx
[r2-route-policy]apply cost 50
[r2-route-policy]quit
[r2]route-policy isis2ospf permit node 2
[r2-route-policy]if-match acl 2001
[r2-route-policy]apply tag 20
[r2-route-policy]quit
[r2]route-policy isis2ospf permit node 3
[r2-route-policy]quit
[r2]ospf 100
[r2-ospf-100]import-route isis 1 route-policy isis2ospf
查看配置结果:
[r1]display ospf routing
OSPF Process 100 with Router ID 1.1.1.1
Routing Tables
Routing for Network
Destination Cost Type NextHop AdvRouter Area
1.1.1.1/32 0 Stub 1.1.1.1 1.1.1.1 0.0.0.0
12.1.1.0/24 1 Transit 12.1.1.1 1.1.1.1 0.0.0.0
Routing for ASEs
Destination Cost Type Tag NextHop AdvRouter
10.1.1.0/24 1 Type2 20 12.1.1.2 2.2.2.2
10.1.2.0/24 50 Type2 1 12.1.1.2 2.2.2.2
10.1.3.0/24 1 Type2 1 12.1.1.2 2.2.2.2
10.1.4.0/24 1 Type2 1 12.1.1.2 2.2.2.2
23.1.1.0/24 1 Type2 1 12.1.1.2 2.2.2.2
Total Nets: 7
Intra Area: 2 Inter Area: 0 ASE: 5 NSSA: 0