关于路由的发布和接收使用route-map过滤，防止本AS作为一个转发区域。

在XRV3上和XRV4上使用prefix-list 进行路由接搜和发布的过滤

XRV3配置

=========================================================

!
!
ip prefix-list as65001-ct seq 5 permit 10.178.1.0/24
ip prefix-list as65001-ct seq 10 permit 10.178.2.0/24
ip prefix-list as65001-ct seq 15 permit 10.178.3.0/24
ip prefix-list as65001-ct seq 20 permit 10.178.4.0/24
ip prefix-list as65001-ct seq 25 permit 10.178.5.0/24
ip prefix-list as65001-ct seq 30 permit 10.178.6.0/24
ip prefix-list as65001-ct seq 35 permit 10.178.7.0/24
ip prefix-list as65001-ct seq 40 permit 10.178.8.0/24
ip prefix-list as65001-ct seq 45 permit 10.178.9.0/24
ip prefix-list as65001-ct seq 50 permit 10.178.10.0/24
ip prefix-list as65001-ct seq 55 permit 10.178.11.0/24
ip prefix-list as65001-ct seq 60 permit 10.178.12.0/24
ip prefix-list as65001-ct seq 65 permit 10.178.13.0/24
ip prefix-list as65001-ct seq 70 permit 10.178.14.0/24
ip prefix-list as65001-ct seq 75 permit 10.178.15.0/24
ip prefix-list as65001-ct seq 80 permit 10.178.16.0/24
!
ip prefix-list as65001-export seq 5 permit 10.138.1.0/24
ip prefix-list as65001-export seq 10 permit 10.138.2.0/24
ip prefix-list as65001-export seq 15 permit 10.138.3.0/24
ip prefix-list as65001-export seq 20 permit 10.138.4.0/24
ip prefix-list as65001-export seq 25 permit 10.138.5.0/24
ip prefix-list as65001-export seq 30 permit 10.138.6.0/24
ip prefix-list as65001-export seq 35 permit 10.138.7.0/24
ip prefix-list as65001-export seq 40 permit 10.138.8.0/24
ip prefix-list as65001-export seq 45 permit 10.138.9.0/24
ip prefix-list as65001-export seq 50 permit 10.138.10.0/24
ip prefix-list as65001-export seq 55 permit 10.138.11.0/24
ip prefix-list as65001-export seq 60 permit 10.138.12.0/24
ip prefix-list as65001-export seq 65 permit 10.138.13.0/24
ip prefix-list as65001-export seq 70 permit 10.138.14.0/24
ip prefix-list as65001-export seq 75 permit 10.138.15.0/24
ip prefix-list as65001-export seq 80 permit 10.138.16.0/24
ip prefix-list as65001-export seq 85 permit 10.173.1.0/24
ip prefix-list as65001-export seq 90 permit 10.173.2.0/24
ip prefix-list as65001-export seq 95 permit 10.173.3.0/24
ip prefix-list as65001-export seq 100 permit 10.173.4.0/24
ip prefix-list as65001-export seq 105 permit 10.173.5.0/24
ip prefix-list as65001-export seq 110 permit 10.173.6.0/24
ip prefix-list as65001-export seq 115 permit 10.173.7.0/24
ip prefix-list as65001-export seq 120 permit 10.173.8.0/24
ip prefix-list as65001-export seq 125 permit 10.173.9.0/24
ip prefix-list as65001-export seq 130 permit 10.173.10.0/24
ip prefix-list as65001-export seq 135 permit 10.173.11.0/24
ip prefix-list as65001-export seq 140 permit 10.173.12.0/24
ip prefix-list as65001-export seq 145 permit 10.173.13.0/24
ip prefix-list as65001-export seq 150 permit 10.173.14.0/24
ip prefix-list as65001-export seq 155 permit 10.173.15.0/24
ip prefix-list as65001-export seq 160 permit 10.173.16.0/24
ip prefix-list as65001-export seq 165 permit 10.178.1.0/24
ip prefix-list as65001-export seq 170 permit 10.178.2.0/24
ip prefix-list as65001-export seq 175 permit 10.178.3.0/24
ip prefix-list as65001-export seq 180 permit 10.178.4.0/24
ip prefix-list as65001-export seq 185 permit 10.178.5.0/24
ip prefix-list as65001-export seq 190 permit 10.178.6.0/24
ip prefix-list as65001-export seq 195 permit 10.178.7.0/24
ip prefix-list as65001-export seq 200 permit 10.178.8.0/24
ip prefix-list as65001-export seq 205 permit 10.178.9.0/24
ip prefix-list as65001-export seq 210 permit 10.178.10.0/24
ip prefix-list as65001-export seq 215 permit 10.178.11.0/24
ip prefix-list as65001-export seq 220 permit 10.178.12.0/24
ip prefix-list as65001-export seq 225 permit 10.178.13.0/24
ip prefix-list as65001-export seq 230 permit 10.178.14.0/24
ip prefix-list as65001-export seq 235 permit 10.178.15.0/24
ip prefix-list as65001-export seq 240 permit 10.178.16.0/24
!
ip prefix-list as65001-import seq 5 permit 10.158.2.0/24
ip prefix-list as65001-import seq 10 permit 10.158.3.0/24
ip prefix-list as65001-import seq 15 permit 10.158.4.0/24
ip prefix-list as65001-import seq 20 permit 10.158.5.0/24
ip prefix-list as65001-import seq 25 permit 10.158.6.0/24
ip prefix-list as65001-import seq 30 permit 10.158.7.0/24
ip prefix-list as65001-import seq 35 permit 10.158.8.0/24
ip prefix-list as65001-import seq 40 permit 10.158.9.0/24
ip prefix-list as65001-import seq 45 permit 10.158.10.0/24
ip prefix-list as65001-import seq 50 permit 10.158.11.0/24
ip prefix-list as65001-import seq 55 permit 10.158.12.0/24
ip prefix-list as65001-import seq 60 permit 10.158.13.0/24
ip prefix-list as65001-import seq 65 permit 10.158.14.0/24
ip prefix-list as65001-import seq 70 permit 10.158.15.0/24
ip prefix-list as65001-import seq 75 permit 10.158.16.0/24
ip prefix-list as65001-import seq 80 permit 10.133.1.0/24
ip prefix-list as65001-import seq 85 permit 10.133.2.0/24
ip prefix-list as65001-import seq 90 permit 10.133.3.0/24
ip prefix-list as65001-import seq 95 permit 10.133.4.0/24
ip prefix-list as65001-import seq 100 permit 10.133.5.0/24
ip prefix-list as65001-import seq 105 permit 10.133.6.0/24
ip prefix-list as65001-import seq 110 permit 10.133.7.0/24
ip prefix-list as65001-import seq 115 permit 10.133.8.0/24
ip prefix-list as65001-import seq 120 permit 10.133.9.0/24
ip prefix-list as65001-import seq 125 permit 10.133.10.0/24
ip prefix-list as65001-import seq 130 permit 10.133.11.0/24
ip prefix-list as65001-import seq 135 permit 10.133.12.0/24
ip prefix-list as65001-import seq 140 permit 10.133.13.0/24
ip prefix-list as65001-import seq 145 permit 10.133.14.0/24
ip prefix-list as65001-import seq 150 permit 10.133.15.0/24
ip prefix-list as65001-import seq 155 permit 10.133.16.0/24
ip prefix-list as65001-import seq 160 permit 10.78.1.0/24
ip prefix-list as65001-import seq 165 permit 10.78.2.0/24
ip prefix-list as65001-import seq 170 permit 10.78.3.0/24
ip prefix-list as65001-import seq 175 permit 10.78.4.0/24
ip prefix-list as65001-import seq 180 permit 10.78.5.0/24
ip prefix-list as65001-import seq 185 permit 10.78.6.0/24
ip prefix-list as65001-import seq 190 permit 10.78.7.0/24
ip prefix-list as65001-import seq 195 permit 10.78.8.0/24
ip prefix-list as65001-import seq 200 permit 10.78.9.0/24
ip prefix-list as65001-import seq 205 permit 10.78.10.0/24
ip prefix-list as65001-import seq 210 permit 10.78.11.0/24
ip prefix-list as65001-import seq 215 permit 10.78.12.0/24
ip prefix-list as65001-import seq 220 permit 10.78.13.0/24
ip prefix-list as65001-import seq 225 permit 10.78.14.0/24
ip prefix-list as65001-import seq 230 permit 10.78.15.0/24
ip prefix-list as65001-import seq 235 permit 10.78.16.0/24
!
route-map as65001-import permit 10
match ip address prefix-list as65001-import
!
route-map as65001-ct permit 10
match ip address prefix-list as65001-ct
set as-path prepend 65001 65001 65001
!
route-map as65001-ct permit 11
match ip address prefix-list as65001-export
!

!
router bgp 65001
bgp router-id 192.168.1.3
neighbor 10.201.1.1 route-map as65001-import in
neighbor 10.201.1.1 route-map as65001-ct out
!

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