华为之基于ISIS的BGP基础配置

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1、华为BGP基础配置之基于ISIS1、配置IPR1配置：R1interface LoopBack 0R1-LoopBack0ip address 1.1.1.1 32R1-LoopBack0quitR1interface GigabitEthernet 0/0/0R1-GigabitEthernet0/0/0ip address 12.1.1.1 24R1-GigabitEthernet0/0/0quitR1interface GigabitEthernet 0/0/1R1-GigabitEthernet0/0/1ip address 192.168.1.1 24R1-GigabitEthern

2、et0/0/1quitR2配置：R2interface LoopBack 0R2-LoopBack0ip address 2.2.2.2 32R2-LoopBack0quitR2interface GigabitEthernet 0/0/0R2-GigabitEthernet0/0/0ip address 12.1.1.2 24R2-GigabitEthernet0/0/0quitR2interface GigabitEthernet 0/0/1R2-GigabitEthernet0/0/1ip address 23.1.1.2 24R2-GigabitEthernet0/0/1quitR3配

3、置：R3interface LoopBack 0R3-LoopBack0ip address 3.3.3.3 32R3-LoopBack0quitR3interface GigabitEthernet 0/0/0R3-GigabitEthernet0/0/0ip address 23.1.1.3 24R3-GigabitEthernet0/0/0quitR3interface GigabitEthernet 0/0/1R3-GigabitEthernet0/0/1ip address 34.1.1.3 24R3-GigabitEthernet0/0/1quitR4配置：R4interface

4、LoopBack 0R4-LoopBack0ip address 4.4.4.4 32R4-LoopBack0quitR4interface GigabitEthernet 0/0/0R4-GigabitEthernet0/0/0ip address 34.1.1.4 24R4-GigabitEthernet0/0/0quitR4interface GigabitEthernet 0/0/1R4-GigabitEthernet0/0/1ip address 45.1.1.4 24R4-GigabitEthernet0/0/1quitR5配置：R5interface LoopBack 0R5-L

5、oopBack0ip address 5.5.5.5 32R5-LoopBack0quitR5interface GigabitEthernet 0/0/0R5-GigabitEthernet0/0/0ip address 45.1.1.5 24R5-GigabitEthernet0/0/0quitR5interface GigabitEthernet 0/0/1R5-GigabitEthernet0/0/1ip address 192.168.2.1 24R5-GigabitEthernet0/0/1quit2、配置ISIS区域，使用level-1、level-2均可。这里使用level-2

6、R2配置：R2isis 1R2-isis-1network-entity 49.0001.0000.0000.0002.00R2-isis-1is-level level-2R2-isis-1quit只开启GE0/0/1和loopback 0的ISIS即可R2interface LoopBack 0R2-LoopBack0isis enable R2-LoopBack0quitR2interface GigabitEthernet 0/0/1R2-GigabitEthernet0/0/1isis enable R2-GigabitEthernet0/0/1quitR3配置：R3isis 1R3

7、-isis-1network-entity 49.0001.0000.0000.0003.00R3-isis-1is-level level-2R3-isis-1quitR3interface LoopBack 0R3-LoopBack0isis enableR3-LoopBack0quitR3interface GigabitEthernet 0/0/0R3-GigabitEthernet0/0/0isis enable R3-GigabitEthernet0/0/0quitR3interface GigabitEthernet 0/0/1R3-GigabitEthernet0/0/1isi

8、s enableR3-GigabitEthernet0/0/1quitR4配置：R4isis 1R4-isis-1network-entity 49.0001.0000.0000.0004.00R4-isis-1quitR4interface LoopBack 0R4-LoopBack0isis enableR4-LoopBack0quitR4interface GigabitEthernet 0/0/0R4-GigabitEthernet0/0/0isis enableR4-GigabitEthernet0/0/0quit调试命令：R3display isis peer R3display

9、ip routing-table3、配置左侧EBGP配置EBGP之前，先打通1.1.1.1到2.2.2.2的静态路由R1配置：R1ip route-static 2.2.2.2 32 12.1.1.2R1bgp 100R1-bgprouter-id 1.1.1.1R1-bgppeer 2.2.2.2 as-number 200R1-bgppeer 2.2.2.2 connect-interface LoopBack 0R1-bgppeer 2.2.2.2 ebgp-max-hop 2R1-bgpquitR2配置：R2ip route-static 1.1.1.1 32 12.1.1.1R2bg

10、p 200R2-bgprouter-id 2.2.2.2R2-bgppeer 1.1.1.1 as-number 100R2-bgppeer 1.1.1.1 connect-interface LoopBack 0R2-bgppeer 1.1.1.1 ebgp-max-hop 2R2-bgpquit调试命令：R2dis bgp peer4、右侧EBGP配置R4配置：R4ip route-static 5.5.5.5 32 45.1.1.5R4bgp 200R4-bgprouter-id 4.4.4.4R4-bgppeer 5.5.5.5 as-number 300R4-bgppeer 5.5.

11、5.5 connect-interface LoopBack 0R4-bgppeer 5.5.5.5 ebgp-max-hop 2R4-bgpquitR5配置R5ip route-static 4.4.4.4 32 45.1.1.4R5bgp 300R5-bgprouter-id 5.5.5.5R5-bgppeer 4.4.4.4 as-number 200R5-bgppeer 4.4.4.4 connect-interface LoopBack 0R5-bgppeer 4.4.4.4 ebgp-max-hop 2R5-bgpquit调试命令R5dis bgp peer5、配合中间IBGP在前

12、面的配置步骤中已经配置router-id，这里就不再重复配置。R2配置：R2bgp 200R2-bgppeer 3.3.3.3 as-number 200R2-bgppeer 3.3.3.3 connect-interface LoopBack 0R2-bgppeer 3.3.3.3 next-hop-local#边界路由器需配置此参数R2-bgppeer 4.4.4.4 as-number 200R2-bgppeer 4.4.4.4 connect-interface LoopBack 0R2-bgppeer 4.4.4.4 next-hop-local#边界路由器需配置此参数R2-bgpq

13、uitR3配置：R3bgp 200R3-bgppeer 2.2.2.2 as-number 200R3-bgppeer 2.2.2.2 connect-interface LoopBack 0R3-bgppeer 4.4.4.4 as-number 200R3-bgppeer 4.4.4.4 connect-interface LoopBack 0R3-bgpquitR3dis bgp peerR4配置：R4和R2都属于边界路由，配置方法相同。R4bgp 200R4-bgppeer 3.3.3.3 as-number 200R4-bgppeer 3.3.3.3 connect-interfac

14、e LoopBack 0R4-bgppeer 3.3.3.3 next-hop-localR4-bgpR4-bgppeer 2.2.2.2 as-number 200R4-bgppeer 2.2.2.2 connect-interface LoopBack 0R4-bgppeer 2.2.2.2 next-hop-localR4-bgpquitR4dis bgp peer至此，所有的BGP路由配置都已经打通，但是还没有生成BGP路由。接下来需要做两项工作:一是在bgp上宣告网段，一是在边界路由器上引入其他路由协议的自治系统，这里是引入ISIS 1。宣告网络时，一定要注意子网掩码的一致性。6、在

15、R1和R5上宣告其他子网和引入直连路由。R1配置：R1bgp 100R1-bgpnetwork 192.168.1.0 24R1-bgpnetwork 1.1.1.1 32R1-bgpimport-route direct R1-bgpdis bgp routing-table BGP Local router ID is 1.1.1.1 Status codes: * - valid, - best, d - damped, h - history, i - internal, s - suppressed, S - Stale Origin : i - IGP, e - EGP, ? -

16、incomplete Total Number of Routes: 8 Network NextHop MED LocPrf PrefVal Path/Ogn * 1.1.1.1/32 0.0.0.0 0 0 ? * 12.1.1.0/24 0.0.0.0 0 0 ? * 12.1.1.1/32 0.0.0.0 0 0 ? * 127.0.0.0 0.0.0.0 0 0 ? * 127.0.0.1/32 0.0.0.0 0 0 ? * 192.168.1.0 0.0.0.0 0 0 i * 0.0.0.0 0 0 ? * 192.168.1.1/32 0.0.0.0 0 0 ?R5配置：R5

17、bgp 300R5-bgpnetwork 192.168.2.0 24R5-bgpnetwork 5.5.5.5 32R5-bgpimport-route direct R5-bgpdis bgp routing-table BGP Local router ID is 5.5.5.5 Status codes: * - valid, - best, d - damped, h - history, i - internal, s - suppressed, S - Stale Origin : i - IGP, e - EGP, ? - incomplete Total Number of

18、Routes: 10 Network NextHop MED LocPrf PrefVal Path/Ogn * 5.5.5.5/32 0.0.0.0 0 0 ? * 12.1.1.0/24 4.4.4.4 0 200 100? * 45.1.1.0/24 0.0.0.0 0 0 ? * 45.1.1.5/32 0.0.0.0 0 0 ? * 127.0.0.0 0.0.0.0 0 0 ? * 127.0.0.1/32 0.0.0.0 0 0 ? * 192.168.1.0 4.4.4.4 0 200 100i * 192.168.2.0 0.0.0.0 0 0 i * 0.0.0.0 0 0 ? * 192.168.2.1/32 0.0.0.0 0 0 ?7、在IBGP的两个边界路由上引入ISIS、直连路由和静态路由。引入静态路由是解决1.1.1.1和5.5.5.5的联通。R2配置：R2bgp 200R2-bgpimport-route isis 1R2-bgpimport-route direct R2-bgpimport-route staticR4配置：R4bgp 200R4-bgpimport-route isis 1R4-bgpimport-route direct R4-bgpimport-route static