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bfd multihoming failover

从两个VPS位置实现BGP故障切换和多宿主

使用BGP从两个位置宣告相同前缀，实现自动故障切换。涵盖LOCAL_PREF、MED、AS-path prepending、BFD和优雅关闭，包含完整的BIRD2和FRR配置。

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RPKI ROA配置BGP：创建ROA，在BIRD2和FRR中验证路由

在RIPE NCC门户中创建IPv4和IPv6 ROA，安装Routinator作为RTR缓存，在BIRD2和FRRouting中配置RPKI路由源验证，使用bgp.tools和RIPE Stat验证前缀状态。

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bgp frrouting frr

在Linux VPS上配置FRRouting BGP

在Linux VPS上逐步配置FRRouting BGP,宣告自有IPv4和IPv6前缀。涵盖安装、vtysh配置、prefix-list、route-map、GTSM和nftables防火墙规则。

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