1、BGP網(wǎng)絡(luò)綜合配置方案技術(shù)創(chuàng)新，變革未來BGP豐富的屬性賦予了BGP強大的路由選路功能，在應(yīng)用中能夠靈活應(yīng)用BGP的屬性完成復(fù)雜路由選路與策略應(yīng)用是BGP的精華所在。本章通過一個案例，結(jié)合配置來講解在應(yīng)用中如何充分發(fā)揮BGP的屬性完成復(fù)雜的選路工作。引入掌握BGP的配置掌握BGP屬性的配置掌握路由策略的應(yīng)用課程目標(biāo)學(xué)習(xí)完本課程，您應(yīng)該能夠：網(wǎng)絡(luò)概況RTBRTCAS 600AS 500AS 300AS 400RTDRTFRTERTA使用BGP的原因網(wǎng)絡(luò)上行連接到2個ISP，易于實現(xiàn)負載分擔(dān)使用BGP屬性及路由策略，易于實現(xiàn)選路IBGPEBGPEBGPEBGPISP-1ISP-2網(wǎng)絡(luò)基本配置（1）

2、RTBRTCRTAbgp 600 network 1.1.1.1 255.255.255.255 network 80.12.2.0 255.255.255.252 network 80.12.2.100 255.255.255.255 network 172.16.1.0 255.255.255.252 network 192.16.1.0 255.255.255.252 peer 192.16.1.2 as-number 500 peer 80.12.1.100 as-number 600 peer 80.12.1.100 next-hop-local peer 80.12.1.100 c

3、onnect-interface LoopBack0ospf 1 area 0.0.0.0 network 80.12.2.0 0.0.0.255 network 172.16.1.0 0.0.0.3100.10.1.1/30192.16.1.1/30bgp 600 network 1.1.1.1 255.255.255.255 network 80.12.1.0 255.255.255.252 network 80.12.1.100 255.255.255.255 network 172.16.1.0 255.255.255.252 network 100.10.1.0 255.255.25

4、5.252 peer 100.10.1.2 as-number 400 peer 80.12.2.100 as-number 600 peer 80.12.2.100 next-hop-local peer 80.12.2.100 connect-interface LoopBack0ospf 1 area 0.0.0.0 network 80.12.1.0 0.0.0.255 network 172.16.1.0 0.0.0.3ospf 1 area 0.0.0.0 network 1.1.1.1 0.0.0.0 network 80.12.1.0 0.0.0.255 network 80.

5、12.2.0 0.0.0.25580.12.1.1/3080.12.1.2/3080.12.2.2/3080.12.2.1/30172.16.1.2/30172.16.1.1/30L0: 80.12.1.100/32L0: 80.12.2.100/32L0: 1.1.1.1/32網(wǎng)絡(luò)基本配置（2）RTDRTFRTEbgp 500 network 192.16.1.0 255.255.255.252 network 192.16.1.4 255.255.255.252 network 192.16.1.100 255.255.255.255 peer 192.16.1.1 as-number 6

6、00 peer 192.16.1.6 as-number 300bgp 400 network 100.10.1.0 255.255.255.252 network 100.10.1.100 255.255.255.255 network 153.13.1.0 255.255.255.252 peer 100.10.1.1 as-number 600 peer 153.13.1.1 as-number 300bgp 300 network 153.13.1.0 255.255.255.252 network 153.13.1.100 255.255.255.255 network 192.16

7、.1.4 255.255.255.252 peer 153.13.1.2 as-number 400 peer 192.16.1.5 as-number 500100.10.1.2/30192.16.1.2/30153.13.1.2/30153.13.1.1/30192.16.1.6/30192.16.1.5/30L0: 192.16.1.100/32L0: 100.10.1.100/32L0: 153.13.1.100/32L1: 200.10.1.1/32選路配置（1）RTBRTCRTAospf 1 area 0.0.0.0 default-route-advertise always c

8、ost 1000100.10.1.1/30192.16.1.1/3080.12.1.1/3080.12.1.2/3080.12.2.2/3080.12.2.1/30172.16.1.2/30172.16.1.1/30L0: 1.1.1.1/32ospf 1 area 0.0.0.0 default-route-advertise always cost 2000RTA訪問外部的流量優(yōu)先選擇RTB選路配置（2）RTBRTCRTAbgp 600peer 192.16.1.2 route-policy lp importroute-policy lp permit node 10if-match a

9、s-path 100apply local-preference 300route-policy lp permit node 20ip as-path 100 permit 500$100.10.1.1/30192.16.1.1/3080.12.1.1/3080.12.1.2/3080.12.2.2/3080.12.2.1/30172.16.1.2/30172.16.1.1/30L0: 1.1.1.1/32bgp 600peer 100.10.1.2 route-policy lp importroute-policy lp permit node 10apply local-prefere

10、nce 200為了達到負載分擔(dān)，經(jīng)由RTC訪問除了AS500的其他網(wǎng)絡(luò)AS 500AS 400AS 300選路配置（3）RTDRTFRTEroute-policy tuanti permit node 10 if-match acl 2000 apply community no-exportroute-policy tuanti permit node 20bgp 300 peer 192.16.1.5 route-policy tuanti export peer 192.16.1.5 advertise-community100.10.1.2/30192.16.1.2/30153.13.

11、1.2/30153.13.1.1/30192.16.1.6/30192.16.1.5/30L0: 192.16.1.100/32L0: 100.10.1.100/32RTD不向RTB發(fā)布路由153.13.1.0/30D=153.13.1.0/30Community=NO_EXPORTD=153.13.1.0/30Community=NO_EXPORT選路配置（4）RTDRTFRTEbgp 300 network 200.10.1.1 255.255.255.255 aggregate 200.10.0.0 255.255.0.0 detail-suppressed100.10.1.2/30192.16.1.2/30153.13.1.2/30153.13.1.1/30192.16.1.6/30192.16.1.5/30L0: 192.16.1.100/32